MX Series AC and DC Power Source User Manual

Transcription

MX Series
AC and DC Power Source
User Manual
Series I / Series II
7003-960 Rev AP
www.programmablepower.com
User Manual – Rev AP
AMETEK Programmable Power
User's Manual
California Instruments - AC Power Source
By AMETEK Programmable Power.
Models:
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MX30-1
MX30-3
MX30-3Pi
MX45-1
MX45-3
MX45-3Pi
MX60-3
MX60-3Pi (-MB)
MX90-3
MX90-3Pi (-MB)
MX135-3
MX135-3Pi (-MB)
MX180-3
MX180-3Pi (-MB)
MX225-3
MX225-3Pi (-MB)
MX270-3
MX270-3Pi (-MB)
Note: For MX15-1, MX15-1Pi, see user manual P/N 7005-960.
MX Series
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About AMETEK
AMETEK Programmable Power, Inc., a Division of AMETEK, Inc., is a global leader in the design and
manufacture of precision, programmable power supplies for R&D, test and measurement, process control,
power bus simulation and power conditioning applications across diverse industrial segments. From bench
top supplies to rack-mounted industrial power subsystems, AMETEK Programmable Power is the proud
manufacturer of Elgar, Sorensen, California Instruments and Power Ten brand power supplies.
AMETEK, Inc. is a leading global manufacturer of electronic instruments and electromechanical devices with
annualized sales of $2.5 billion. The Company has over 11,000 colleagues working at more than 80
manufacturing facilities and more than 80 sales and service centers in the United States and around the
world.
Trademarks
AMETEK is a registered trademark of AMETEK, Inc. California Instruments is a trademark owned by AMETEK,
Inc. Other trademarks, registered trademarks, and product names are the property of their respective
owners and are used herein for identification purposes only.
Notice of Copyright
MX Series User Manual © 2003-2009 AMETEK Programmable Power, Inc. All rights reserved.
Exclusion for Documentation
UNLESS SPECIFICALLY AGREED TO IN WRITING, AMETEK PROGRAMMABLE POWER, INC. (“AMETEK”):
(a) MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY OF ANY TECHNICAL OR
OTHER INFORMATION PROVIDED IN ITS MANUALS OR OTHER DOCUMENTATION.
(b) ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSSES, DAMAGES, COSTS OR EXPENSES, WHETHER
SPECIAL, DIRECT, INDIRECT, CONSEQUENTIAL OR INCIDENTAL, WHICH MIGHT ARISE OUT OF THE
USE OF SUCH INFORMATION. THE USE OF ANY SUCH INFORMATION WILL BE ENTIRELY AT THE
USER’S RISK, AND
(c) REMINDS YOU THAT IF THIS MANUAL IS IN ANY LANGUAGE OTHER THAN ENGLISH, ALTHOUGH STEPS
HAVE BEEN TAKEN TO MAINTAIN THE ACCURACY OF THE TRANSLATION, THE ACCURACY CANNOT BE
GUARANTEED. APPROVED AMETEK CONTENT IS CONTAINED WITH THE ENGLISH LANGUAGE VERSION,
WHICH IS POSTED AT WWW.PROGRAMMABLEPOWER.COM.
Date and Revision
March 2010 Revision AN
Part Number
7003-960
Contact Information
Telephone:
800 733 5427 (toll free in North America)
858 450 0085 (direct)
Fax:
Email:
858 458 0267
[email protected]
[email protected]
www.programmablepower.com
Web:
MX Series
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Important Safety Instructions
Before applying power to the system, verify that your product is configured properly for your particular
application.
WARNING
Hazardous voltages may be present when covers are removed. Qualified
personnel must use extreme caution when servicing this equipment.
Circuit boards, test points, and output voltages also may be floating above
(below) chassis ground.
WARNING
The equipment used contains ESD sensitive parts. When installing
equipment, follow ESD Safety Procedures. Electrostatic discharges might
cause damage to the equipment.
Only qualified personnel who deal with attendant hazards in power supplies, are allowed to perform installation
and servicing.
Ensure that the AC power line ground is connected properly to the Power Rack input connector or chassis.
Similarly, other power ground lines including those to application and maintenance equipment must be
grounded properly for both personnel and equipment safety.
Always ensure that facility AC input power is de-energized prior to connecting or disconnecting any cable.
In normal operation, the operator does not have access to hazardous voltages within the chassis. However,
depending on the user’s application configuration, HIGH VOLTAGES HAZARDOUS TO HUMAN SAFETY may
be normally generated on the output terminals. The customer/user must ensure that the output power lines are
labeled properly as to the safety hazards and that any inadvertent contact with hazardous voltages is
eliminated.
Guard against risks of electrical shock during open cover checks by not touching any portion of the electrical
circuits. Even when power is off, capacitors may retain an electrical charge. Use safety glasses during open
cover checks to avoid personal injury by any sudden component failure.
Neither AMETEK Programmable Power Inc., San Diego, California, USA, nor any of the subsidiary sales
organizations can accept any responsibility for personnel, material or inconsequential injury, loss or damage
that results from improper use of the equipment and accessories.
SAFETY SYMBOLS
MX Series
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Product Family: MX Series AC Power Source
Warranty Period: 1 Year
WARRANTY TERMS
AMETEK Programmable Power, Inc. (“AMETEK”), provides this written warranty covering the Product stated
above, and if the Buyer discovers and notifies AMETEK in writing of any defect in material or workmanship
within the applicable warranty period stated above, then AMETEK may, at its option: repair or replace the
Product; or issue a credit note for the defective Product; or provide the Buyer with replacement parts for the
Product.
The Buyer will, at its expense, return the defective Product or parts thereof to AMETEK in accordance with
the return procedure specified below. AMETEK will, at its expense, deliver the repaired or replaced Product
or parts to the Buyer. Any warranty of AMETEK will not apply if the Buyer is in default under the Purchase
Order Agreement or where the Product or any part thereof:
•
is damaged by misuse, accident, negligence or failure to maintain the same as specified or
required by AMETEK;
•
is damaged by modifications, alterations or attachments thereto which are not authorized by
AMETEK;
•
is installed or operated contrary to the instructions of AMETEK;
•
is opened, modified or disassembled in any way without AMETEK’s consent; or
•
is used in combination with items, articles or materials not authorized by AMETEK.
The Buyer may not assert any claim that the Products are not in conformity with any warranty until the Buyer
has made all payments to AMETEK provided for in the Purchase Order Agreement.
PRODUCT RETURN PROCEDURE
Request a Return Material Authorization (RMA) number from the repair facility (must be done in the
country in which it was purchased):
•
In the USA, contact the AMETEK Repair Department prior to the return of the product to
AMETEK for repair:
Telephone:
•
800-733-5427, ext. 2295 or ext. 2463 (toll free North America)
858-450-0085, ext. 2295 or ext. 2463 (direct)
Outside the United States, contact the nearest Authorized Service Center (ASC). A full
listing can be found either through your local distributor or our website,
www.programmablepower.com, by clicking Support and going to the Service Centers tab.
When requesting an RMA, have the following information ready:
•
Model number
•
Serial number
•
Description of the problem
NOTE: Unauthorized returns will not be accepted and will be returned at the shipper’s expense.
NOTE: A returned product found upon inspection by AMETEK, to be in specification is subject to an
evaluation fee and applicable freight charges.
MX Series
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Table of Contents
1. Introduction ................................................................................................................................... 11 1.1 1.2 1.3 General Description......................................................................................................................... 11 Manual organization and format ...................................................................................................... 11 Different Model Series..................................................................................................................... 12 2. Specifications ............................................................................................................................... 13 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Electrical.......................................................................................................................................... 13 Mechanical ...................................................................................................................................... 23 Environmental ................................................................................................................................. 24 Regulatory ....................................................................................................................................... 24 Front Panel Controls ....................................................................................................................... 24 Special Features and Options ......................................................................................................... 25 Supplemental Specifications ........................................................................................................... 34 3. Unpacking and Installation ........................................................................................................... 39 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 Unpacking ....................................................................................................................................... 39 Power Requirements ....................................................................................................................... 39 Mechanical Installation .................................................................................................................... 40 AC Input Connections and Wiring ................................................................................................... 40 AC On/Off Circuit Breaker on MX Series front panel....................................................................... 43 Output Connections......................................................................................................................... 45 Connectors - Rear Panel ................................................................................................................. 59 Multiple Cabinet System Configurations (incl. –MB)........................................................................ 67 Multiple Cabinet Power Up/Down Procedures................................................................................. 69 Clock and Lock Configurations........................................................................................................ 70 Basic Initial Functional Test............................................................................................................. 72 Remote Inhibit / Remote Shutdown ................................................................................................. 74 Junction Box Accessory .................................................................................................................. 75 Output Filter Box Accessory ............................................................................................................ 76 Fuse Box Accessory........................................................................................................................ 77 4. Front Panel Operation .................................................................................................................. 78 4.1 4.2 4.3 4.4 4.5 4.6 4.7 Tour of the Front Panel ................................................................................................................... 78 Menu Structure................................................................................................................................ 85 Output Programming ..................................................................................................................... 124 Waveform Management [3Pi Controller only] ................................................................................ 126 Standard Measurements ............................................................................................................... 131 Advanced Measurements [3Pi Controller only].............................................................................. 133 Transient Programming................................................................................................................. 142 5. Principle of Operation ................................................................................................................. 149 5.1 5.2 5.3 5.4 5.5 5.6 5.7 General ......................................................................................................................................... 149 Overall Description ........................................................................................................................ 149 Controller Assembly ...................................................................................................................... 151 System Interface Board................................................................................................................. 155 Current / Voltage Sensor Board .................................................................................................... 155 Low Voltage Power Supply............................................................................................................ 155 Power Module ............................................................................................................................... 156 6. Calibration................................................................................................................................... 161 6.1 6.2 6.3 6.4 6.5 MX Series
Recommended Calibration Equipment .......................................................................................... 161 Front Panel Calibration Screens.................................................................................................... 162 Routine Measurement Calibration ................................................................................................. 165 Routine Output Calibration ............................................................................................................ 169 Non-Routine Calibration ................................................................................................................ 177 6
7. Service........................................................................................................................................ 182 7.1 7.2 7.3 7.4 7.5 7.6 7.7 Cleaning ........................................................................................................................................ 182 General ......................................................................................................................................... 182 Basic operation.............................................................................................................................. 182 Advanced Troubleshooting............................................................................................................ 184 Factory Assistance ........................................................................................................................ 186 Fuses ............................................................................................................................................ 187 Firmware Updates ......................................................................................................................... 188 8. Top Assembly Replaceable Parts .............................................................................................. 191 9. Options ....................................................................................................................................... 194 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9 9.10 9.11 Introduction ................................................................................................................................... 194 Option -HV: Additional AC Voltage Range .................................................................................... 195 Option –160: RTCA/DO-160 Tests................................................................................................ 196 Option –411: IEC 61000-4-11 Voltage Dips and Interruptions....................................................... 210 Option –413: IEC 61000-4-13 Interharmonics Test ....................................................................... 218 Option –704: MilStd704 Tests ....................................................................................................... 229 Option –ABD: Airbus ABD0100.1.8 Test ....................................................................................... 241 Option –AMD: Airbus AMD24C Test ............................................................................................. 241 Option –787: Boeing B787-0147 Test .......................................................................................... 241 Option –WHM: Watt Hour Measurement....................................................................................... 242 Option –SNK: Current Sink ........................................................................................................... 244 10. Error Messages .......................................................................................................................... 247 Index.................................................................................................................................................. 252 MX Series
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List of Figures
Figure 2-1: MX30-3 Voltage / Current Rating Chart for 150/300 V AC Ranges......................................................................... 17 Figure 2-2: MX45-3 Voltage / Current Rating Chart for 150/300 V AC Ranges – Max Rating.................................................... 17 Figure 2-3: Voltage / Current Rating Chart for 150/300 V AC Ranges – Derated....................................................................... 18 Figure 2-4: MX30-3 Voltage / Current Rating Chart for 200/400 V DC Ranges.......................................................................... 19 Figure 2-5: MX45-3 Voltage / Current Rating Chart for 200/400 V DC Ranges – Max. Rating .................................................. 19 Figure 2-6: Voltage / Current Rating Chart for 200/400 V DC Ranges – Derated ........................................................................ 1 Figure 2-7: MX30-3 Voltage / Current Rating Chart, -HV Option ............................................................................................... 29 Figure 2-8: MX45-3 Voltage / Current Rating Chart, -HV Option – Max. Rating......................................................................... 29 Figure 2-9: Voltage / Current Rating Chart, -HV Option – Derated............................................................................................. 29 Figure 2-10: -HF Option Voltage Frequency Rating 300V range ................................................................................................ 31 Figure 2-11: -HF Option Voltage Frequency Rating 150V range ................................................................................................ 31 Figure 2-12: MX output filter option schematic ........................................................................................................................... 36 Figure 2-13: MX45 Output Noise 10 KHz – 1 MHz ..................................................................................................................... 37 Figure 2-14: MX45 Output Noise 10 KHz - 1 MHz with optional Filter ........................................................................................ 38 Figure 3-1: The MX45 Power Source.......................................................................................................................................... 39 Figure 3-2: Location of AC Input Fuse Block and Chassis Ground Connection - Front View, Access Panel Removed............ 41 Figure 3-3: MX Series AC Input Connection Diagram (Rear view) ............................................................................................. 42 Figure 3-4: Rear Panel................................................................................................................................................................ 44 Figure 3-5: External sense cable shield connection to chassis ground ...................................................................................... 45 Figure 3-6: Location of Output Terminals (Front view)................................................................................................................ 48 Figure 3-7: MX30-1 / MX45-1 Output Wiring (Rear view) ........................................................................................................... 49 Figure 3-8: MX30-3 / MX45-3 Output Wiring (Rear view) ........................................................................................................... 50 Figure 3-9:MX60, MX60-MB, MX90 or MX90-MB Output Wiring (Rear view) ............................................................................ 51 Figure 3-10: Two MX's in Clock and Lock mode Output Wiring (Rear view) .............................................................................. 52 Figure 3-11: MX135 or MX135-MB Output Wiring (Rear view)................................................................................................... 54 Figure 3-12: Three MX's in Clock and Lock mode - Output Wiring (Rear view) ......................................................................... 55 Figure 3-13: MX180, MX225 or MX270 Output Wiring (Rear view) ........................................................................................... 57 Figure 3-14: Ship kit Terminal Block dimensions........................................................................................................................ 58 Figure 3-15: RS232C Cable for PC Connection wiring diagram – MX without USB................................................................... 63 Figure 3-16: USB Connector pin orientation. .............................................................................................................................. 64 Figure 3-17: Emergency Switch (ES Option) shut off inter connect on -MB systems. ................................................................ 66 Figure 3-18: Multi-Cabinet DIP Switch Location and Setting ...................................................................................................... 68 Figure 3-19: Functional Test Setup............................................................................................................................................. 73 Figure 3-20: 7003-416-1 Output Junction Box ............................................................................................................................ 75 Figure 3-21: 7003-424-1 Output noise filter box. ........................................................................................................................ 76 Figure 3-22: 7003-426-1 Output Fuse Box ................................................................................................................................. 77 Figure 4-1: Shuttle Knob ............................................................................................................................................................. 80 Figure 4-2: FUNCTION Keypad ................................................................................................................................................. 81 Figure 4-3: Entering Values from the Decimal Keypad ............................................................................................................... 83 Figure 4-4: Cursor UP Key Movement ........................................................................................................................................ 83 Figure 4-5: Cursor DOWN key Movement .................................................................................................................................. 84 Figure 4-6: Main Menu 1 Screen ................................................................................................................................................ 84 Figure 4-7: Menu 1 through 3...................................................................................................................................................... 85 Figure 4-8: PROGRAM Menu ..................................................................................................................................................... 89 Figure 4-9: MEASUREMENTS Screen, Single Phase and Three Phase Modes ....................................................................... 91 Figure 4-10: HARMONICS/TRACE ANALYSIS Screen.............................................................................................................. 93 Figure 4-11: TRANSIENTS Menu ............................................................................................................................................... 96 Figure 4-12: VOLTAGE SURGE/SAG SETUP Screen ............................................................................................................... 97 Figure 4-13: VOLTAGE SWEEP/STEP SETUP Screen ............................................................................................................. 99 Figure 4-14: FREQUENCY SWEEP/STEP SETUP Screen ..................................................................................................... 101 Figure 4-15 VOLTAGE/FREQUENCY SWEEP/STEP SETUP Screen ................................................................................... 102 Figure 4-16:START/VIEW TRANSIENT SEQUENCE Screen.................................................................................................. 103 Figure 4-17: WAVEFORMS Menu ............................................................................................................................................ 104 Figure 4-18: APPLICATIONS Menus........................................................................................................................................ 107 Figure 4-19: SETUP REGISTERS Menu .................................................................................................................................. 108 Figure 4-20: UTILITY Menus..................................................................................................................................................... 109 Figure 4-21: GPIB/RS232 SETUP Menu .................................................................................................................................. 112 Figure 4-22: VOLTAGE/CURRENT CONTROL SETUP Menu................................................................................................. 113 Figure 4-23: INITIAL SETUP Menus......................................................................................................................................... 115 Figure 4-24: LIMIT SETUP Menu.............................................................................................................................................. 117 Figure 4-25: CONFIGURATION SETUP Menus....................................................................................................................... 118 Figure 4-26: OUTPUT IMPEDANCE Menu............................................................................................................................... 121 Figure 4-27: MEASUREMENT CAL FACTORS Menu (Series I only) ...................................................................................... 122 Figure 4-28: MEASUREMENT CAL FACTORS Menu (Series II only) ..................................................................................... 122 Figure 4-29: OUTPUT CAL FACTORS Menu (Series I only).................................................................................................... 123 Figure 4-30: OUTPUT CAL FACTORS Menu (Series II only)................................................................................................... 123 Figure 4-31: Selecting a Waveform .......................................................................................................................................... 126 MX Series
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Figure 4-32: Selecting Waveforms for Single Phase or All Phases .......................................................................................... 126 Figure 4-33: Custom Waveform Creation with GUI Program.................................................................................................... 127 Figure 4-34: Waveform Crest Factor Affects Max. rms Voltage ............................................................................................... 129 Figure 4-35: Waveform Frequency Domain View Mode ........................................................................................................... 130 Figure 4-36: Scrolling Through Tabular FFT Data .................................................................................................................... 134 Figure 4-37: Scrolling through bar chart FFT Data ................................................................................................................... 134 Figure 4-38: Scrolling Through Acquired Waveform Data ........................................................................................................ 136 Figure 4-39: SET VOLT Trigger Source Acquisition ................................................................................................................. 138 Figure 4-40: Positive Trigger Delay (Post Trigger Data) ........................................................................................................... 140 Figure 4-41: Negative Trigger Delay (Pre-Trigger Data)........................................................................................................... 141 Figure 4-42: Pulse Transients ................................................................................................................................................... 143 Figure 4-43: List Transients ...................................................................................................................................................... 144 Figure 4-44: Switching Waveforms in a Transient List.............................................................................................................. 147 Figure 4-45: START/VIEW TRANSIENT SEQUENCE Menu ................................................................................................... 148 Figure 5-1: MX Series Functional Block Diagram ..................................................................................................................... 149 Figure 5-2: MX Series Detailed Block Diagram ........................................................................................................................ 153 Figure 5-3: Power Module Detailed Block Diagram .................................................................................................................. 154 Figure 5-4: Power Module Layout ............................................................................................................................................. 156 Figure 5-5: Amplifier Board Layout ........................................................................................................................................... 158 Figure 6-1: Calibration Setup MX45-1 (Rear view) ................................................................................................................... 163 Figure 6-2: Calibration Setup MX30-3Pi, MX45-3Pi or MX30-3, MX45-3 (Rear view).............................................................. 164 Figure 6-3: Current Measurement Calibration Setup (Rear view)............................................................................................. 165 Figure 6-4: DC offset AC filter ................................................................................................................................................... 169 Figure 6-5: -413 Option Aux Generator Adjustments................................................................................................................ 175 Figure 9-1: Application Menu .................................................................................................................................................... 197 Figure 9-2: DO160 Main Menu.................................................................................................................................................. 198 Figure 9-3: Normal State........................................................................................................................................................... 198 Figure 9-4: Voltage Modulation................................................................................................................................................. 200 Figure 9-5: Frequency Modulation ............................................................................................................................................ 201 Figure 9-6: Power Interrupt ....................................................................................................................................................... 202 Figure 9-7: Power Interrupt for Group 2 and 3 .......................................................................................................................... 203 Figure 9-8: Emergency Screen ................................................................................................................................................. 204 Figure 9-9: Abnormal Screen .................................................................................................................................................... 205 Figure 9-10: DO-160 DC Main Menu ........................................................................................................................................ 207 Figure 9-11: Normal State......................................................................................................................................................... 207 Figure 9-12: Abnormal State ..................................................................................................................................................... 208 Figure 9-13: Application Menu .................................................................................................................................................. 212 Figure 9-14: IEC1000-4-11 Menu ............................................................................................................................................. 212 Figure 9-15: IEC Dips and Interrupts ........................................................................................................................................ 213 Figure 9-16: Voltage Variation Screen...................................................................................................................................... 215 Figure 9-17: EN 61000-4-11 Voltage Variation specification- Edition 1.0................................................................................. 216 Figure 9-18: EN 61000-4-11 Voltage Variation specification- Edition 2.0................................................................................. 216 Figure 9-19: IEC 61000-4-11 GUI screen. ................................................................................................................................ 217 Figure 9-20: Application Setup Menus...................................................................................................................................... 219 Figure 9-21: IEC1000-4-13 Menu ............................................................................................................................................. 219 Figure 9-22: IEC 1000-4-13 FCURVE....................................................................................................................................... 221 Figure 9-23: IEC 1000-4-13 OSWING ...................................................................................................................................... 221 Figure 9-24: IEC 1000-4-13 SWEEP ........................................................................................................................................ 222 Figure 9-25: IEC 1000-4-13 Harmonics .................................................................................................................................... 222 Figure 9-26: IEC 1000-4-13 INTERHARMONICS..................................................................................................................... 223 Figure 9-27: IEC 61000-4-13 Meister Curve ............................................................................................................................. 223 Figure 9-28: IEC 61000-4-13 Test Flowchart Class 1 and 2..................................................................................................... 225 Figure 9-29:IEC 61000-4-13 Test Flowchart Class 3................................................................................................................ 226 Figure 9-30: MENU 2 SCREEN ................................................................................................................................................ 228 Figure 9-31: INTERHARMONICS SCREEN ............................................................................................................................. 228 Figure 9-32: Application Menu .................................................................................................................................................. 231 Figure 9-33: MIL704 Menu........................................................................................................................................................ 232 Figure 9-34: Steady State Menu ............................................................................................................................................... 232 Figure 9-35: Transient Menu..................................................................................................................................................... 234 Figure 9-36: Emergency Menu.................................................................................................................................................. 235 Figure 9-37: Abnormal Screen .................................................................................................................................................. 236 Figure 9-38: MIL704 DC Menu.................................................................................................................................................. 237 Figure 9-39: Steady State DC ................................................................................................................................................... 237 Figure 9-40: Transient Menu..................................................................................................................................................... 238 Figure 9-41: Abnormal Test Screen .......................................................................................................................................... 239 Figure 9-42: Emergency Test.................................................................................................................................................... 240 Figure 9-43: Application Screen................................................................................................................................................ 242 Figure 9-44: Watt-Hour Meter Screen....................................................................................................................................... 242 Figure 9-45: WH-Meter Screen with Function Active ................................................................................................................ 242 Figure 9-46: REGENERATE CONTROL screen....................................................................................................................... 245 MX Series
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List of Tables
Table 3-1: Suggested Input Wiring Sizes for each MX Cabinet * ............................................................................................... 43 Table 3-2: Suggested Output Wiring Sizes * .............................................................................................................................. 46 Table 3-3: Output Terminal connections..................................................................................................................................... 47 Table 3-4: System Interface Connectors..................................................................................................................................... 60 Table 3-5: Analog Interface Connector ....................................................................................................................................... 60 Table 3-6: BNC Connectors ........................................................................................................................................................ 61 Table 3-7: BNC Connectors ........................................................................................................................................................ 61 Table 3-8: External Sense Connector ......................................................................................................................................... 61 Table 3-9: RS232 Connector pin out – MX with RS232 and USB. ............................................................................................. 62 Table 3-10: RS232C Connector pin out – MX with RS232 but no USB...................................................................................... 62 Table 3-11: USB Connector pin out. ........................................................................................................................................... 64 Table 3-12: RJ45 LAN Connector pin out. .................................................................................................................................. 65 Table 3-13: Clock and Lock Configuration settings .................................................................................................................... 70 Table 3-14: Clock and Lock Initialization settings ....................................................................................................................... 71 Table 3-15: Remote Inhibit Mode Settings.................................................................................................................................. 74 Table 6-1: Calibration Load Values........................................................................................................................................... 166 Table 6-2: Measurement Calibration Table............................................................................................................................... 168 Table 6-3: Output Calibration Table – MX Series I ................................................................................................................... 176 Table 6-4: Output Calibration Table – MX Series II .................................................................................................................. 176 Table 6-5: Current Limit Calibration .......................................................................................................................................... 179 Table 6-6: Programmable Z adjustment pots............................................................................................................................ 181 Table 6-7: Formulas to calculate R and L ................................................................................................................................. 181 Table 7-1: Basic Symptoms ...................................................................................................................................................... 182 Table 7-2: MX Fuse Ratings ..................................................................................................................................................... 187 Table 7-3: Flash Down load Messages..................................................................................................................................... 190 Table 8-1: Replaceable Parts ................................................................................................................................................... 193 Table 8-2: Fuses ....................................................................................................................................................................... 193 Table 9-1: Normal Voltage and Frequency Minimum............................................................................................................... 199 Table 9-2: Normal Voltage and Frequency Maximum ............................................................................................................... 199 Table 9-3: Normal Voltage Unbalance...................................................................................................................................... 199 Table 9-4: Normal VoltageSurge Sequence ............................................................................................................................. 203 Table 9-5: Normal Frequency Transient Sequence .................................................................................................................. 204 Table 9-6: Normal Frequency Variation Sequence ................................................................................................................... 204 Table 9-7: Emergency Voltage and Frequency Minimum ......................................................................................................... 205 Table 9-8: Emergency Voltage and Frequency Maximum ........................................................................................................ 205 Table 9-9: Emergency Voltage Unbalance ............................................................................................................................... 205 Table 9-10: Abnormal Voltage Minimum................................................................................................................................... 206 Table 9-11: Abnormal Voltage Maximum.................................................................................................................................. 206 Table 9-12: Abnormal Frequency Transient.............................................................................................................................. 206 Table 9-13: Normal Voltage Minimum ...................................................................................................................................... 207 Table 9-14: Normal Voltage Maximum ..................................................................................................................................... 208 Table 9-15: Voltage Surge ........................................................................................................................................................ 208 Table 9-16: Abnormal Voltage Surge........................................................................................................................................ 209 Table 9-17: Phase mapping...................................................................................................................................................... 211 Table 9-18: IEC 61000-3-34 Table C.2 ..................................................................................................................................... 211 Table 9-19: Dips and Interruptions Tests Performed During RUN ALL ................................................................................... 213 Table 9-20: Voltage Variations Test Performed During RUN ALL ............................................................................................ 215 Table 10-1: Error Messages ..................................................................................................................................................... 251 MX Series
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1. Introduction
This instruction manual contains information on the installation, operation, calibration and
maintenance of all power systems that use the MX Series power sources with the programmable
controller.
1.1 General Description
The MX Series AC and DC power source systems are high efficiency, floor standing AC and DC
power sources that provide a precise output with low distortion. Available voltage ranges are 150
Vac, 300 Vac and 400 Vac in AC mode and 200 Vdc and 400 Vdc in DC mode. The MX30-3Pi and
MX45-3Pi can operate in either single or three-phase mode. The MX30 and MX45 is also available
in just single or three-phase mode. All other models always operate in three-phase mode.
Models with a -1 or -3 designation provide full front panel operation but do not include certain
features such as arbitrary waveform generation unless added as an option at the time of order.
Models with the Pi controller offer several additional standard features, including the RS232C, USB,
LAN (option) and IEEE-488 interfaces, arbitrary waveform generation, dual voltage ranges and
additional measurement functions.
The MX Series units are contained in a compact floor standing enclosure on casters. This allows the
units to be moved around more easily.
Read the installation instructions carefully before attempting to install and operate the MX Series
power systems.
1.2 Manual organization and format
All user documentation for California Instruments power sources is provided on CDROM in electronic
format. (Adobe Portable Document Format) The required Adobe PDF viewer is supplied on the
same CDROM. This manual may be printed for personal use if a hardcopy is desired. To request a
hardcopy from AMETEK Programmable Power, contact customer service at
[email protected]. There will be an additional charge for printed manuals.
This manual contains sections on installation, normal use, maintenance and calibration. If the MX
system is equipped with a GPIB, RS232C, USB or LAN interface, refer to the MX Programming
manual for information on using the remote control interfaces and command syntax. The
programming manual is provided on the same CDROM as this user manual.
MX Series
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1.3 Different Model Series
There are two versions of the MX Series product, Series I and Series II. This user manual covers
both MX model series with top level assembly part numbers 7003-400 (Series I) and 7003-422
(Series II). The difference between the Series I and the Series II is the controller used. The Series II
uses a newer controller design but retains backward compatibility with the Series I products. The part
number is shown on the model / serial number tag on the back of the MX series. All Series II will have
a firmware revision of 4.0 or higher. The firmware revision is displayed briefly at power up on the LCD
display and can also be queried over the bus by using the *IDN? command.
Differences between the two model series are restricted to:
•
Reduced number of measurement calibration coefficients on Series II.
•
Increased measurement sampling rate on Series II.
•
Maximum DC offset range in AC+DC mode is 250Vdc on Series I, 220Vdc on Series II
Where relevant, differences are highlighted throughout the user manual.
MX Series
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2. Specifications
Specifications shown are valid over an ambient temperature range of 25 ± 5° C and apply after a 30
minute warm-up time. Unless otherwise noted, all specifications are per phase for sine wave output
into a resistive load. For three phase configurations or mode of operation, all specifications are for
Line to Neutral (L-N) and phase angle specifications are valid under balanced load conditions only.
Note: Specifications for input and output current and power on MX180, MX225 and MX270
configurations are 4, 5 and 6 times those of MX45-3 and are not separately listed.
2.1 Electrical
2.1.1 Input
Parameter
MX30
MX45
MX60
MX90
MX135
208 VLL ±10%
Line Voltage:
(3 phase, 3
wire + ground
(PE))
230 VLL ±10%
400 VLL ±10%
480 VLL ±10%
Line VA:
Line Current:
37 KVA
53 KVA
74 KVA
106 KVA
159 KVA
116 ARMS @
187 VLL
175 ARMS @
187 VLL
105 ARMS @
207 VLL
157 ARMS @
207 VLL
Each MX30
chassis
requires its
own AC
service.
Each MX45
chassis
requires its
own AC
service.
Each MX45
chassis
requires its
own AC
service.
60 ARMS @
360 VLL
90 ARMS @
360 VLL
50 ARMS @
432 VLL
75 ARMS @
432 VLL
Total Line
currents are
2 x MX30
Total Line
currents are
2 x MX45
Total Line
currents are
3 x MX45
Each MX30
chassis
requires its
own AC
service.
Each MX45
chassis
requires its
own AC
service.
Each MX45
chassis
requires its
own AC
service.
Total Peak
currents are
2 x MX30
Total Peak
currents are
2 x MX45
Total Peak
currents are
3 x MX45
Line
Frequency:
47-63 Hz
Efficiency:
85 % (typical) depending on line and load
Power Factor:
0.95 (typical) / 0.99 at full power.
Inrush Current:
230 Apk @ 208 VLL
220Apk @ 230 VLL
132Apk @ 400 VLL
110Apk @ 480 VLL
MX Series
Hold-Up Time:
> 10 ms
Isolation
Voltage:
2200 VAC input to output
1350 VAC input to chassis
13
2.1.2 Output
Note:
All specifications are for AC and DC unless otherwise indicated.
Output Parameter
MX30
MX45
MX60
MX90
MX135
Modes
Std
Controller
AC, DC
Pi
Controller
AC, DC, AC+DC
Voltage:
Ranges (L-N):
AC Mode
Low: 0 - 150 V / High: 0 - 300 V
DC Mode
Low: 0 - 200 V / High: 0 - 400 V
AC+DC Mode
AC: Low: 0 - 150 V / High: 0 - 300 V
DC Offset: Low Vrange: 0 - 150 V
High Vrange: 0 - 220 V (Series II) / High; 0 – 250 V (Series I).
Note:
On MX units with standard controller, only one voltage range is available unless
the -R range change option is installed.
Resolution:
AC Mode
0.1 V
DC Mode
0.1 V
AC+DC Mode
AC:
DC Offset:
0.1 V
Series I
0.01 V
0.1 V
1V
Series II
0.01 V
Accuracy:
± 0.3 V AC mode
± 1 V DC mode
Distortion THD1:
(Resistive full load)
MX units shipped before 2009
< 1 % @ 16 - 66 Hz
< 2 % @ 66 - 500 Hz
< 3 % @ > 500 Hz
< 2.5 V
2.5 - 25 V
> 25 V
MX units shipped as of 2009
< 0.5 % @ 16 - 66 Hz
< 1.00 % @ 66 - 500 Hz
< 1.25 % @ > 500 Hz
Load Regulation:
0.25 % FS @ DC - 100 Hz
0.5 % FS @ > 100 Hz
Line Regulation:
DC Offset Voltage:
0.1% for 10% input line change
< 20 mV
1
The distortion specification for the MX Series is valid for pure (inductance < 12 uH) resistive load conditions and using a
30 KHz LP filter on distortion meter.
MX Series
14
Output Parameter
MX30
MX45
MX60
MX90
MX135
Output Noise:
(20 kHz to 1 MHz)
< 2 VRMS low V Range
< 3 VRMS high V Range
Output Coupling
DC coupled
Except on optional -HV or -XV Voltage range output, which is AC coupled.
Power (total power for all phases, either range, at full scale voltage, maximum ambient T = 35° C)
AC Mode
30 KVA
45 KVA
60 KVA
90 KVA
135 KVA
DC Mode
20 KW
30 KW
40 KW
60 KW
90 KW
AC+DC Mode
The maximum power and current in the AC+DC mode is equal to that in the DC
mode
Current
Note: Current, maximum amps indicated per phase available between 50 and 100 % of voltage
range. Maximum ambient temperate for full power operation at full-scale voltage is 35° C.
Constant Power Mode:
Operation at higher currents but constant power is possible from 80% of Voltage range
(125% of max. current) declining to 100% of maximum current at 100 % of voltage range
for short periods of time or at reduced ambient temperatures. (< 15 mins @ 30° C). See
Figure 2-3 and Figure 2-4. (Requires firmware revision 0.27 or higher.)
For MX30-3Pi model, constant power mode is supported at max ambient temperature.
AC Mode
DC Mode
AC+DC Mode
Note:
MX30-1
V Lo: 200 A
V Hi: 100 A
MX45-1
V Lo: 300 A
V Hi: 150 A
MX30-3, per
phase
V Lo: 66.7 A
V Hi: 33.3 A
MX45-3, per
phase
V Lo: 100 A
V Hi: 50 A
MX30-1
V Lo: 100 A
V Hi: 50 A
MX45-1
V Lo: 150 A
V Hi: 75 A
MX30-3, per
phase
V Lo: 33.3 A
V Hi: 16.7 A
MX45-3, per
phase
V Lo: 50 A
V Hi: 25 A
MX60-3, per
phase
V Lo: 133 A
V Hi: 66.7 A
MX90-3, per
phase
V Lo: 200 A
V Hi: 100 A
MX135-3, per
phase
V Lo: 300 A
V Hi: 150 A
MX60-3, per
phase
V Lo: 66.7 A
V Hi: 33.3 A
MX90-3, per
phase
V Lo: 100 A
V Hi: 50 A
MX135-3, per
phase
V Lo: 150 A
V Hi: 75 A
Current derates linearly from 50% of voltage range to 20% of specified current at 5% of
voltage range
Current Limit mode
Programmable, CC or CV mode
Repetitive Peak Current
Note:
Maximum Peak Current shown. Value shown reflects absolute peak current protection level. This level
may not be reached under all load conditions. Depending on load conditions, peak current may max out at lower
levels due to amplifier output impedance.
Note:
As of firmware revision 4.52, a repetitive peak current limit function is provided which will generate a fault
and shut off the power supply if the peak current drawn by the load exceeds the maximum level for more than 30
seconds. During this time, the amplifier will limit the peak current at a somewhat level above the maximum level but
it is not allowable to run in this mode indefinitely. This should provide sufficient time to ride through any
startup/inrush load conditions.
AC Mode
MX30-1 / MX30-3Pi 1Phs /
MX45-1 / MX45-3Pi 1Phs
V Lo: 900 A
V Hi: 450 A
MX30-3 / MX30-3Pi / MX45-3
MX Series
MX60-3 / MX90-3, per
MX135-3, per
15
Output Parameter
MX30
MX45
/ MX45-3Pi, per phase
V Lo: 300 A
V Hi: 150 A
MX60
MX90
MX135
phase
V Lo: 900 A
V Hi: 450 A
phase
V Lo: 600 A
V Hi: 300 A
Frequency
Range:
Standard:
-LF option:
-HF option:
Resolution:
0.01 Hz
0.1 Hz
Accuracy:
± 0.01 %
16 Hz - 819.0 Hz (for –HV option range, 45 Hz – 819.0 Hz)
16 Hz - 500.0 Hz
16 Hz – 905 Hz
from 16.00 to 81.91 Hz
from 82.0 to 819.0 Hz
Phase (3 phase mode)
Range:
Phase B/C relative to phase A
0.0 to 360.0°
Resolution:
0.1°
Accuracy:
16 Hz - 100 Hz: < 1.5°
100 Hz - 500 Hz: < 2°
> 500 Hz:
< 4°
Ext. Sync Mode
Input:
Isolated TTL input for external frequency control. Requires 5V at 5 mA for logic
high.
Accuracy:
Ext. Sync to phase A with fixed Ext. Sync Frequency input:
16 Hz - 100 Hz: < 2°
100 Hz - 500 Hz: < 3°
> 500 Hz:
< 4°
Programmable Output Impedance (available on MX30-3Pi and MX45-3Pi in three phase mode only)
Note:
MX Series
Range:
R: 1 – 200 mOhm
L: 15 – 200 uH
N/A
N/A
N/A
Resolution:
R: 1 mOhm
L: 1 uH
N/A
N/A
N/A
Accuracy:
10 % FS
N/A
N/A
N/A
Output specifications apply below the Current / Voltage rating lines shown in the V/I
rating chart below.
16
Figure 2-1: MX30-3 Voltage / Current Rating Chart for 150/300 V AC Ranges.
100 A
100
Current
(RMS)
80
Low V Range
60
50 A
40
High V Range
20
7.5 15
75
150
300
Voltage (RMS)
Figure 2-2: MX45-3 Voltage / Current Rating Chart for 150/300 V AC Ranges – Max Rating.
MX Series
17
Figure 2-3: Voltage / Current Rating Chart for 150/300 V AC Ranges – Derated.
MX Series
18
Figure 2-4: MX30-3 Voltage / Current Rating Chart for 200/400 V DC Ranges
50 A
50
Current
(DC)
40
Low V Range
30
25 A
20
High V Range
10
20 40
100
200
400
Voltage (DC)
Figure 2-5: MX45-3 Voltage / Current Rating Chart for 200/400 V DC Ranges – Max. Rating
MX Series
19
62.5 A
60
50
Current
(DC)
40
Full
Power
31 A
30
25 A
20
Full
Power
10
0
20
40
100
150
200
300
400
Voltage (DC)
Figure 2-6: Voltage / Current Rating Chart for 200/400 V DC Ranges – Derated
2.1.3 AC Measurements
Measurement specifications apply to MX30-3 / MX30-3Pi / MX45-3 or MX45-3Pi in three-phase
mode. See notes for other models and configurations.
Parameter
Range
Accuracy (±)
Resolution
Frequency
16.00 - 820.0 Hz
0.01% + 0.01 Hz
0.01 to 81.91 Hz
0.1 to 500 Hz
RMS Voltage
0 - 400 Volts
0.05V + 0.02%, <100 Hz
0.1V + 0.02%, 100-820 Hz
0.01 Volt
RMS Current
0 - 150 Amps
0.15A + 0.02%, <100 Hz
0.3A + 0.02%, 100-820 Hz
0.01 Amp
Peak Current
0 - 400 Amps
0.15A + 0.02%, <100 Hz
0.3A + 0.02%, 100-820 Hz
0.01 Amp
VA Power
0 - 15 KVA
30 VA + 0.1%, <100 Hz
60 VA + 0.1%, 100-820 Hz
10 VA
Real Power
0 - 15 KW
30 W + 0.1%, <100 Hz
60 W + 0.1%, 100-820 Hz
10 W
Power Factor
(>0.2kVA)
0.00 - 1.00
0.01, <100 Hz
0.02, 100-820 Hz
0.01
Note: Accuracy specifications are valid above 100 counts. For current and power measurements,
specifications apply from 2% to 100% of measurement range. Current and Power range and accuracy
specifications are times three for MX45-1, MX60, MX90 and MX135 or MX30-3Pi / MX45-3Pi in singlephase mode.
Note: Power factor accuracy applies for PF > 0.5 and VA > 50 % of max.
MX Series
20
2.1.4 DC Measurements
Parameter
Range
Accuracy (±)
Resolution
Voltage
0 - 400 Volts
0.5 Volts
0.1 Volt
Current
0 - 400 Amps
0.5 Amps
0.01 Amp
Power
0 - 10 kW
30 W
10 W
Note: Accuracy specifications are valid above 100 counts. For current and power measurements,
specifications apply from 2% to 100% of measurement range. Current and Power accuracy and
resolution specifications are times three for MX30-1, MX45-1, MX60, MX90 and MX135 or MX30-3Pi /
2.1.5 Harmonic Measurements (Pi controller)
Harmonic measurement specifications apply to MX30-3, MX45-3, MX30-3Pi and MX45-3Pi in threephase mode. See notes for other models and configurations.
Parameter
Range
Accuracy (±)
Resolution
16.00 - 820 Hz
0.03% + 0.03 Hz
0.01 Hz
32.00 Hz – 6.67 KHz
32.00 Hz – 16 KHz
0.03% + 0.03 Hz
0.01 Hz
32.00 Hz - 19.2 KHz
32.00 Hz – 48 KHz
0.03% + 0.03 Hz
0.01 Hz
Phase
0.0 - 360.0°
2° typ.
0.5°
Voltage
Fundamental
0.75V
0.01V
Harmonic 2 - 50
0.75V + 0.3% + 0.3%/kHz
0.01V
Fundamental
0.5A
0.1A
Harmonic 2 - 50
0.15A + 0.3% + 0.3%/kHz
0.1A
Frequency fundamental
Frequency harmonics
MX45-3, MX45-3Pi in 3
phase mode, MX60,
MX90, MX135:
Series I
Series II
MX45-1, MX45-3Pi in 1
phase mode:
Series I
Series II
Current
Note: For current measurements, specifications apply from 2% to 100% of measurement range.
Current range and accuracy specifications are times three for MX30-1, MX45-1, MX60, MX90 and
MX135 or MX30-3Pi / MX45-3Pi in single-phase mode.
2.1.6 System Specification
MX Series
Parameter
Specification
External Modulation:
0 to 10%
Synchronization
Input:
Isolated TTL input for external frequency control. Requires 5V at 5 mA for
logic high.
Trigger Input:
External trigger source input. Requires TTL level input signal. Triggers on
negative edge. Response time 80 - 100 μs.
Trigger Output:
Programmable through transient list system. 400 μs pulse for voltage or
frequency change Isolated TTL output Output reverts to Function strobe
21
Parameter
Specification
frequency change. Isolated TTL output. Output reverts to Function strobe
when not uses as Trig Out. This function is mutually exclusive with the
Function Strobe output.
Function Strobe:
Active for any voltage or frequency program change. 400 μs pulse for voltage
or frequency change. Isolated TTL output. This function is mutually exclusive
with the Trigger Output. Same output is used for Trigger Output if Trigger
Output is programmed as part of list system.
Output Status:
Monitors status of output relay. Isolated TTL output. High if output relay is
closed, low if output relay is open.
Non volatile memory
storage:
Series I: 8 complete instrument setups and transient lists, 32 events per list.
Waveforms
Sine (Models with Standard controller)
Series II: 16 complete instrument setups and transient lists, 100 events per
list.
Sine, square, clipped, user defined (Models with Pi controller)
Transients
Voltage: drop, step, sag, surge, sweep
Frequency: step, sag, surge, sweep
Voltage and Frequency: step, sweep
IEEE-488 Interface:
SH1, AH1, T6, L3, SR1, RL2, DC1, DT1
Syntax: IEEE 488.2 and SCPI
Response time is 10 ms (typical)
RS232C Interface:
Bi-directional serial interface
9 pin D-shell connector
Handshake:
CTS, RTS
Data bits:
7, 8
Stop bits:
1,2
Baud rate:
9600 to 115,200 bps
Syntax: IEEE 488.2 and SCPI.
Note: Disconnect any USB connection when using the RS232 interface.
USB Interface:
Standard USB 1.1 peripheral.
Data transfer rate: 460,800 bps
Syntax: IEEE 488.2 and SCPI.
Note: Use of the USB port to control more than one power source
from a single PC is not recommended, as communication may not be
reliable. Use GPIB interface for multiple power source control.
LAN Interface:
Option –LAN. When the LAN interface is installed, the RS232 interface is
disabled.
RJ45 Connector, 10BaseT, 100BaseT or 1000BaseT,
Data transfer rate: 460,800 bps
Protocol: TCP/IP.
Syntax: IEEE 488.2 and SCP
Note: Disconnect any USB connection when using the LAN interface.
Current Limit Modes:
MX Series
Two selectable modes of operation:
1.
Constant current mode (voltage folds back with automatic recovery)
2.
Constant voltage mode with trip-off (Relays open).
22
2.1.7 Unit Protection
Input Over current:
In-line fast acting fuses. Check fuse rating in Service and Maintenance
section. Ratings will depend on AC input configuration settings.
Circuit breaker for LV supply.
Input Over voltage:
Automatic shutdown.
Input Over voltage
Transients:
Surge protection to withstand EN50082-1 (IEC 801-4, 5) levels.
Output Over current:
Adjustable level constant current mode with programmable set point.
Output Short Circuit:
Peak and RMS current limit.
Over temperature:
Automatic shutdown.
2.2 Mechanical
Parameter
Dimensions:
(for each MX chassis)
Specification
Height:
50.0”
1270 mm
Width:
28.75”
731 mm
Depth:
34.5”
876 mm
Unit Weight:
(for each MX chassis)
Net:
1150 lbs / 522 Kg approximately
Shipping:
1231 lbs / 560 Kg approximately
Material:
Steel chassis with aluminum panels and covers.
Finish:
Light textured painted external surfaces.
Panels semi-gloss polyurethane color no. 26440 (medium gray)
MX Series
Cooling:
Fan cooled with air intake on the front and exhaust to the rear.
Fans:
6 x 225CFM.
Air displacement
22 Cu Ft/sec. Max.
Internal Construction:
Modular sub assemblies.
Rear Panel
Connections:
(See section 3 for description of connections)
•
Cable entry and strain relieve for AC input wiring
•
Cable entry and strain relieve for output wiring
•
External sense terminal block (Remote voltage sense)
•
System interface (2x)
•
Clock and Lock BNC's (requires -LKM or -LKS options)
•
RS232, USB, GPIB, LAN (option)
•
Trigger In BNC
•
Trigger Out BNC
•
Function Strobe BNC
•
Output Status
23
2.3 Environmental
Parameter
Operating Temp:
Specification
0° to +35° C. (Except in CP mode).
+32° to +104° F.
Storage Temp:
-40° to +85 °C.
-40° to +185° F.
Altitude:
< 2000 meters
Relative Humidity:
0-95 % RAH, non-condensing maximum for temperatures up to 31°C
decreasing linearly to 50% at 40°C.
Installation/Over voltage
Category:
ΙΙ
Pollution Degree:
2
Indoor Use Only
Vibration:
Designed to meet NSTA 1A transportation levels.
Shock:
Designed to meet NSTA 1A transportation levels.
2.4 Regulatory
Electromagnetic
Emissions and Immunity:
Designed to meet EN50081-2 and EN50082-2 European Emissions and
Immunity standards as required for the “CE” mark.
Acoustic Noise:
65 dBA maximum at 0% to 50% load, 75 dBA maximum greater than
50% load to 100% load. Measured at one meter.
Safety:
Designed to EN 61010-1 European safety standards as required for the
“CE” mark.
2.5 Front Panel Controls
Controls:
MX Series
Shuttle knob:
Allows continuous change of all values including output calibration and
range change.
Decimal keypad:
A conventional decimal keypad facilitates quick entry of numerical values
such as voltage, current limit, etc. The large blue enter key will make the
value you enter effective. Using the SET key allows the user to preset all
parameter values and update them all at once by pressing the Enter key.
Up/down arrow keys:
A set of up and down arrow keys is used to move the cursor position in all
menus. This allows quick selection of the desired function or parameter.
Function keys:
Measure key will display most measurement values. Program key will
show all program parameters. Output on/off key for output relay control.
Phase key will switch display to show program and measured values for
each phase.
24
Displays:
LCD graphics display:
A large high contrast LCD display with backlight provides easy to read
guidance through all setup operations. An adjustable viewing angle
makes it easy to read from all practical locations.
Status indicators:
Large and bright status indicators inform the user of important power
source conditions. The Remote lamp informs the user that the unit is
under remote control. The Overload lamp indicates that excessive
current is being drawn at the output. The Over temperature lamp
illuminates when internal heat sink temperatures are too high. The Hi
Range indicator is lit any time the unit is switched to the high voltage
range. The Output On/Off indicator is on when the power source output
relays are closed.
2.6 Special Features and Options
Controller Features
Mode:
Switches between 1 and 3 phase outputs. This mode is available on
models MX30-3Pi and MX45-3Pi only.
Parallel Operation:
Up to three units can be paralleled in a three-phase configuration (with
one master controller and one or two auxiliary units). (MX60, MX90 and
MX135). Only the master unit requires a controller in this setup. The
auxiliary units are controlled through the system interface.
Clock and Lock Mode:
(Option -LKM and -LKS
required).
Three units (all with controllers) can be connected in a three-phase
configuration using CLOCK and LOCK connections. Each unit requires
its own controller in this configuration. One unit acts as the master and
provides the reference clock to the auxiliary units.
Note: This option cannot be combined with –HF option.
Controller:
Programmable controller front panel assembly.
Output Relay:
Standard output relay feature to isolate power source from the load.
Output On/Off:
The output relay can be used to quickly disconnect the load. A green
status indicator displays the status of the output relay.
Firmware / Software Options
- 704
Mil Std 704D & E test firmware.
Mil Std 704A, B, C, & F test software (refer to Avionics Software Manual
P/N 4994-971 for details).
Note: Requires use of MXGui Windows application software provided on
CD ROM CIC496.
- 160
RTCA/DO-160D test firmware
RTCA/DO-160E test software (refer to Avionics Software Manual P/N
4994-971 for details)..
CD ROM CIC496.
MX Series
- 411
IEC 61000-4-11 test firmware (Pre-compliance)
- 413
IEC 61000-4-13 test firmware
-A350
Airbus A350 ABD0100.1.8.1 Test software (refer to Avionics Software
Manual P/N 4994-971 for details)..
CD ROM CIC496.
-ABD
Airbus A380 ABD0100.1.8 Test software (refer to Avionics Software
Manual P/N 4994-971 for details)..
25
CD ROM CIC496.
-AMD
Airbus AMD24C Test software (refer to Avionics Software Manual P/N
4994-971 for details)..
CD ROM CIC496.
-B787
Boeing 787 Test software (refer to Avionics Software Manual P/N 4994971 for details)..
CD ROM CIC496.
-WHM
Watt Hour Measurements (Accuracy and Resolution. See Sec. 2.6.3.)
Output Voltage Range Options
- HV
Adds 400 V AC only output range.
- XV
Adds customer specified AC only output range. Contact factory for
details.
-ES
Emergency Shut off switch. This option key lock push button is installed
on the front panel of the master MX if ordered with the MX system. When
pushed in, the main AC contactor is opened disconnecting the AC input
power to the MX input transformer. Note that the controller (and LCD
display) will still be powered up but no power is available to the amplifiers
and there will be no output power either. The controller runs off the LV
supply, which must be turned off with the front panel breaker.
Misc. Options
After the ES has been pushed, the provided key will be required to
release it. Once the ES button has been released, the MX must be
powered down using the front panel circuit breaker and turned back on to
start up again.
Note: For multibox MX Systems (MX90 and up with more than one
controller and front panel controls, each of which having an ES
emergency switch, to connect a BNC cable between the cabinets for the
ES connection. For 3 or more cabinets with controller, this BNC can be
daisy chained using BNC T connectors.
Note: Do not misplace the 2 keys provided, as no duplicates are
available from CI. If lost, the ES switch must be replaced. In that case,
contact AMETEK Programmable Power customer service.
([email protected] ).
-HF
-LAN
-LF
MX Series
Increases maximum output frequency to 905 Hz.
Note: This option cannot be combined with –LKM or -LKS option.
Adds Ethernet interface (RJ45 connector) for local area network
connection..
Limits maximum output frequency to 500 Hz.
-LKM
Clock and Lock system, Master. (Not available with –HF option)
-LKS
Clock and Lock system, Auxiliary. (Not available with –HF option)
-MB
Multi-box Option. Provides additional controllers in Auxiliary units of
multi-cabinet configurations (MX60, MX90, MX135) to allow individual
MX45 units to be used stand-alone.
-SNK
Current Sink Option. Allows application of regenerative loads that feed
energy (current, power) back into the MX output stage. The energy fed
back is returned to the AC line (utility) feeding the MX.
26
External Accessories (External to MX chassis)
7003-416-1
Input / Output wiring junction box. Connects two to six three-phase MX45
cabinet outputs, neutral and ground to a common output terminal block
housed in a metal enclosure junction box. Can also be used to connect
multiple MX chassis to common AC input service. See section 3.13 for
details.
7003-424-1
Output noise filter, 3 phase + neutral. May be used to reduce output
noise of MX30 or MX45 when testing EUT’s for conducted emissions.
This is an external filter that attenuates the 250 KHz ripple frequency on
the MX output by > 20 dB. The filter is rated for 125A per phase and 800
Hz. For multi-box configurations, one filter is required per chassis.
Connects to MX30 or MX45 three-phase output terminal only.
7003-426-1
Output fuse box. Provides added protection for MX system configurations
consisting of more than 2 MX cabinets. (MX135, MX180, MX225 and
MX270).
2.6.1 -HV Option Specifications
The -HV option provides an AC only output range of 0 to 400 Vac L-N. Specifications unique to the HV option are shown in the table below.
Output Parameter
MX30
MX45
MX60
MX90
MX135
90 KVA
135 KVA
Modes
Pi Controller
AC
Voltage:
Ranges (L-N):
0 -400 V
Resolution:
0.1 V
Accuracy:
± 0.25% of Full Scale / ± 1.0 Vac rms
Output Coupling
AC coupled
Power (total power for all phases, either range, at full scale voltage)
AC Mode
30 KVA
45 KVA
60 KVA
Current
Note: Current, maximum amps per phase available between 50 and 100 % of voltage range.
MX30-1
76.5 A
MX45-1
112.5 A
MX30-3, per
phase
25.5 A
MX45-3, per
phase
37.5 A
MX30-1
337.5 A
MX45-1
337.5 A
MX30-3, per
phase
112.5 A
MX45-3, per
phase
112.5 A
MX60-3, per
phase
50 A
MX90-3, per
phase
75 A
MX135-3,
per phase
112.5 A
MX60-3, per
phase
225 A
MX90-3, per
phase
225 A
MX135-3,
per phase
337.5 A
Peak Current
AC Mode
Frequency:
Range:
MX Series
45 Hz – 819 Hz
with LF option: 45 Hz
500 Hz
27
Output Parameter
MX30
MX45
MX60
MX90
MX135
with –LF option: 45 Hz – 500 Hz
with –HF option: 45 Hz – 905 Hz (see also –HF option specification.)
MX Series
28
Note:
Output specifications apply below the Current / Voltage rating lines shown in the V/I
rating chart below.
Figure 2-7: MX30-3 Voltage / Current Rating Chart, -HV Option
Current
(RMS)
37.5
37.5 A
-HV Range
20
100
200
300
400
Voltage (RMS)
Figure 2-8: MX45-3 Voltage / Current Rating Chart, -HV Option – Max. Rating.
Figure 2-9: Voltage / Current Rating Chart, -HV Option – Derated.
MX Series
29
2.6.2 -XV Option Specifications
Consult factory for -XV option specifications.
2.6.3 -HF Option Specifications
The -HF option extends the maximum available output frequency from 819 Hz to 905 Hz. Some
restrictions are in effect at this increased output frequency level.
All other specifications of the MX45 system remain unchanged if this option is installed except as
noted in the table below.
-HF Option:
Frequency
Range:
-HF option:
16 Hz - 905 Hz
Resolution:
0.01 Hz
0.1 Hz
1 Hz
< from 16.00 to 81.92 Hz
> from 82.0 to 819.2 Hz
> from 820 to 905 Hz
Accuracy:
± 0.01 %
Phase
Accuracy:
16 - 100 Hz:
100 - 500 Hz:
500 – 819 Hz:
819 – 905 Hz:
< 1.5°
< 2°
< 4°
< 5°
Voltage
High Voltage Range
Maximum voltage at 905 Hz is 290 Vrms
Maximum frequency at 300 Vrms is 875 Hz
See Figure 2-10
Low Voltage Range
Maximum frequency at 150 Vrms is 875 Hz
See Figure 2-11.
-HV Voltage Range
Maximum frequency at 400 Vrms is 875 Hz .
Note: If the voltage or frequency settings shown here are exceeded for
any length of time (> 1 sec), the MX may shut down generating an over
temperature fault to protect itself.
MX Series
30
Figure 2-10: -HF Option Voltage Frequency Rating 300V range
Figure 2-11: -HF Option Voltage Frequency Rating 150V range
MX Series
31
2.6.4 -LF Option Specifications
The -LF option limits the maximum available output frequency to 500 Hz. All other specifications of
the MX45 system remain unchanged if this option is installed.
2.6.5 WHM Option Specifications
Watt-hour measurement mode:
Accuracy:
0-6.000KW
>6.000KW
0.01KWH + 0.1%
<100 Hz
0.02KWH +0.1%
100-819 Hz
Times three of the above specification
Resolution:
0.001 KWH
MX Series
32
2.6.6 SNK Option Specifications
The –SNK or current sink option enables the MX power source to sink current from the unit under
test. This mode of operation is particularly useful when testing grid-tied products that feed energy
back onto the grid. The ability of the MX to simulate the grid provides unique opportunities to test the
EUT for compatibility to commonly occurring line anomalies like voltage and/or frequency
fluctuations. Examples of these types of EUT are inverters (PV Solar, Wind) hybrid drive systems,
regenerative breaks.
The SNK option requires special amplifiers that have a different control loop from the standard MX
amplifiers. Consequently, the upper frequency limit of an MX configured with the –SNK option is
500Hz as opposed to the standard 819Hz. Also, the voltage distortion levels are slightly higher than
on MX units without this option.
-SNK Option:
Frequency
Range:
-HF option:
16 Hz - 500 Hz
Resolution:
0.01 Hz
0.1 Hz
< from 16.00 to 81.92 Hz
> from 82.0 to 500.0 Hz
Accuracy:
± 0.01 %
Phase
Accuracy:
16 - 100 Hz:
100 - 500 Hz:
< 1.5°
< 2°
Voltage
Distortion THD1:
(Resistive full load)
< 1 % @ 16 - 66 Hz
< 2 % @ 66 - 500 Hz
Power
Capability
Full power can be returned into MX as long as current does not exceed
maximum current limit setting for selected range. See REGENERATE
CONTROL screen for protection settings in REGEN mode.
Without –SNK option
MX units without the SNK will generate an warning message (Error 31) if
more than 20% of available power (per phase) is regenerated by the load.
It will shut off (Error 32) if the negative power reaches 30% of available
power.
Programmable Output Impedance (available on MX15-1Pi, MX30-30Pi and MX45-3Pi only)
Auto-disabled
Programmable impedance is turned off as soon as a regenerative load is
detected. Once turned off, it will remain off until programmed by user
again. This is required as programmable impedance is based on
delivering current which is not the case when driving a regenerative load.
Measurements
Power
Regenerated power is displayed with a negative sign to indicate direction
of power flow.
All other specifications of the MX system remain unchanged if this option is installed.
1
The distortion specification for the MX Series is valid for pure (inductance < 12 uH) resistive load conditions and using a
30 KHz LP filter on distortion meter.
MX Series
33
2.7 Supplemental Specifications
Supplemental specifications are not warranted and generally reflect typical performance
characteristics. These characteristics have been checked on a type test basis only and are not
verified on each unit shipped. They are provided for reference only.
2.7.1 Output
Output Parameter
MX30
MX45
MX60
MX90
MX135
Voltage:
Slew rate:
> 0.5 V/micro sec
Stability:
0.25 % over 24 hour period at constant line, load and temperature.
Settling time:
< 0.5 msec
Frequency:
Temperature
coefficient:
± 5ppm per degree C
Stability:
± 15 ppm per year
Current:
Constant Power
Mode:
Operation at higher currents but constant power is possible from 80% of
Voltage range (125% of max. current) declining to 100% of maximum current
at 100 % of voltage range for short periods of time or at reduced ambient
temperatures. (< 15 mins @ 30° C). See Figure 2-3 and Figure 2-4.
Note: This mode requires firmware revision 0.27 or higher.
2.7.2 Acoustic Noise Levels
Acoustic Noise:
MX Series
Measured at a distance of one meter. (3 ft.)
Front
63 dBA at no load to 68 dBA at full load.
Back
65 dBA at no load to 72 dBA at full load
34
2.7.3 Output Noise Spectrum
The MX series is a switching power supply and as such will have a certain amount of switching noise
at its output. While the overall RMS noise is specified, the specific noise spectrum will differ slightly
from unit to unit. The information provided in this section is for reference only.
The output noise can be reduced by using one or more external filters. A suitable filter is the P/N
7003-424-1 (Figure 2-12) available as an option. Attenuation at the 250 kHz ripple frequency is 20
dBuV. The output voltage drop at 800 Hz full load is less than 1Vrms.
Typical output noise spectrum for a standard MX45-3Pi in three phase mode operating at 400 Hz is
shown in Figure 2-13 for phase A and Neutral. The same output with the use of the optional filter is
shown in Figure 2-14. For connection information, refer to section 3.14.
MX Filter Specifications
(Model 7003-424-1)
Type
Low Pass Filter
Three phase WYE, four wire. (A, B, C and Neutral)
Capability
Frequency range
DC, 16 Hz - 800 Hz
Max Voltage
250 Vrms Line to Neutral / 440 Vrms L-L
Phase Current
125 Arms per phase maximum.
Impedance
Voltage drop at 800 Hz, 125 A is less than 1 Vrms.
Performance
Attenuation
20 dBuV at 250 KHz.
Physical
Enclosures type
Cooper B-Line P/N 16126 SC NK
Dimensions (W x D x H)
Unit:
Shipping:
Net:
Shipping:
Weight
Operating Temp:
MX Series
16” x 12” x 6” / 406 mm x 305 mm x 152 mm
30” x 25” x 11” / 760 mm x 635 mm x 280 mm
28 lbs / 12.7 Kg
40 lbs / 18.2 Kg
0° to +40° C. / +32° to +104° F.
35
Figure 2-12: MX output filter option schematic
MX Series
36
Figure 2-13: MX45 Output Noise 10 KHz – 1 MHz
MX Series
37
Figure 2-14: MX45 Output Noise 10 KHz - 1 MHz with optional Filter
MX Series
38
3. Unpacking and Installation
3.1 Unpacking
Inspect the unit for any possible shipping damage immediately upon receipt. If damage is
evident, notify the carrier. DO NOT return an instrument to the factory without prior approval.
Do not destroy the packing container until the unit has been inspected for damage in shipment.
If possible, retain the container (wooden crate) in the event the system ever has to be returned
to the factory for either repair or upgrades
WARNING: This power source weighs approximately 1150 lbs / 522 Kg. Obtain
adequate help when moving the unit. Make sure the location (floor) in which the MX
Series unit(s) will be installed can support the weight of the unit(s).
3.2 Power Requirements
The MX Series power Source has been designed to operate from a three-phase, three wire
(Wye or Delta) AC input line. A protective earth connection is required as well. (PE).
Available three-phase input settings are 208 VLL (option -208), 230 VLL (option -230), 400 VLL
(option -400), or 480 VLL (option -480).
Figure 3-1: The MX45 Power Source
CAUTION: Do not connect 400 or 480V into a unit set for 208 or 230V unit, the result
could be a severely damaged unit. Always check the input rating on the model
number tag before connecting AC input power. Consult factory if input settings have
to be changed.
MX Series
39
3.3 Mechanical Installation
The MX's are completely self-contained power sources. They are to be used free standing on a
solid surface. The units are fan cooled, drawing air in from the front and exhausting at the rear.
The front and back of each unit must be kept clear of obstruction and a 6” clearance must be
maintained to the rear. Special consideration of overall airflow characteristics and the resultant
internal heat rise must be considered at all times to avoid self heating and over temperature
problems.
3.4 AC Input Connections and Wiring
Three-phase Delta or Y AC input voltage of sufficient amperage (consult AC input specifications
for maximum AC current per phase) is required to power the MX Series.
Note:
AC power should be routed through a properly sized and rated three-phase
PROTECTIVE CIRCUIT BREAKER or similar branch circuit protection device with
disconnect capability. This will protect building wiring and other circuits from
possible damage or shutdown in case of a system problem. It will also facilitate
removing AC input power to the MX system in case of service or reconfiguration
requirements.
Note:
AC input wiring and connections must conform to local electrical safety codes
that apply. Always consult a qualified electrician prior to installation of any MX
System.
AC input connections are to be made directly to the input fuse block. The input fuse block is
located on the lower left hand corner of the front of the MX chassis. To access the input fuse
connection block, the protective front cover needs to be removed first.
CAUTION: Always disconnect any input power completely when removing
any protective cover and allow the internal capacitors to fully discharge
(minimum of 15 mins) before removing any cover.) See Figure 3-2 for details.
No wiring for AC input connections is provided with the MX Series and must be provided by the
end user or installer. Input wiring should be entered through the right hand side (when facing the
back of the MX cabinet, see Figure 3-4) wire access opening located at the rear bottom of the
MX chassis. A wire channel (marked as [2] in figure below) is provided below the input
transformer to allow the input wiring to be routed to the front of the unit where the connections
are to be made.
WARNING:
The power source's input connection wiring gage (size)
must be sized for the maximum input current rating to ensure user safety and
avoid possible power source damage, regardless of the actual output load.
MX Series
40
Figure 3-2: Location of AC Input Fuse Block and Chassis Ground Connection Front View, Access Panel Removed
Note:
To comply with product safety requirements, EARTH GROUND must be
connected to the chassis of the AC power system using the ground stud located
directly below the AC input fuse block. Use a Green/Yellow ground wire.
Note:
DO NOT USE THE NEUTRAL CONNECTION OF A 3 PHASE Y AC POWER
CONNECTION IN PLACE OF A TRUE EARTH GROUND CONNECTION. AC power
system neutrals cannot be used for protective earth ground.
The mains source must have a current rating equal to or greater than the input fuses and the
input wiring must be sized to satisfy the applicable electrical codes. The front cover must be reinstalled prior to use and the strain relief provisions located at the rear bottom of the unit must be
used to maintain protection against hazardous conditions.
MX Series
41
3ø
AC Line
Input
PROTECTIVE
GROUND
EXTERNAL
CIRCUIT
BREAKER
AC MAINS
3 PHASE
Figure 3-3: MX Series AC Input Connection Diagram (Rear view)
MX Series
42
The input power cables and protective circuit breaker used must be large enough to handle the
input current and input voltage of the power source and must conform to local electrical codes.
Consult a qualified electrician prior to installation. Table 3-1 shows the size of the cables that
may be used per MX cabinet. Note that wires must be sized to accommodate the worst-case
maximum current that may occur under low line conditions. Local electrical codes may also
require different wire types and sizes. These ratings should also be used when selecting a
circuit breaker or equivalent disconnect device.
Cable lengths must not exceed twenty-five (25) feet. For lengths greater than 25 feet, calculate
the voltage drop from the following formula:
2 X DISTANCE X CABLE RESISTANCE PER FT. X CURRENT = VOLT DROP
Table 3-1: Suggested Input Wiring Sizes for each MX Cabinet *
Nominal Line
Voltage
Load Current
@ low line
Wire Gauge (US)
Circular Mils
(Kcmils)
Metric (mm2)
480 V
400 V
230 V
208 V
75 ARMS
90 ARMS
157 ARMS
175 ARMS
6 AWG
4 AWG
2 AWG
1 AWG
26.24
41.74
66.36
83.69
13.3
21.1
33.6
42.4
* Using high temperature rated wire. Always consult the National Electrical Code and/or local code
regulations for proper rating and size of wire cabling prior to installation.
CAUTION: Capacitors in the power source may hold a hazardous electrical charge
even if the power source has been disconnected from the mains supply. Allow
capacitors to discharge to a safe voltage before touching exposed pins of mains
supply connectors.
Power modules need at least 15 Minutes to discharge to safe levels before they can
be removed.
3.5 AC On/Off Circuit Breaker on MX Series front panel.
It is important to understand the purpose and operation of the On/Off circuit breaker of the MX
Series located on the lower left side of the front panel. This is a 2A rated breaker that is used to
engage and protect the LV Power supply of the MX chassis only. The LV Power supply
provides DC bias power to the entire MX system. The AC input power is routed through a set of
three AC line fuses (F1, F2 and F3) located in the lower left bottom corner of the MX. (See
Figure 3-2 for fuse locations). These fuses protect the three MX amplifiers and the AC input
transformer from excessive input currents. The AC input power is connected to the input
transformer through a large three-pole contactor. Removing AC power to the LV Power Supply
by opening the front panel circuit breaker (moving the lever to the down (OFF) position) will
cause this contactor to loose its coil voltage and will result in it opening and disconnecting the
input transformer and amplifier from AC mains input.
Note:
MX Series
If any MX system failure has occurred on any part of the MX system, AC input
power must be removed immediately and not restored until the system has been
inspected by a qualifier service technician.
Always turn off the On/Off Circuit breaker before re-applying AC input power.
43
CAUTION: The AC input fuses can only be checked is the MX unit is completely
de-energized and disconnected from any AC power input.
Note:
Under no circumstances should AC input power be applied if one or more of the
AC input line fuses have failed and opened up.
Figure 3-4: Rear Panel
MX Series
44
3.6 Output Connections
3.6.1 Output Wiring
The output terminal blocks, TB1A and TB1B are located at the front of the unit behind the
bottom access panel. See Figure 3-2 for details.
Three phase output line connections are made to terminal block TB1A. The phase outputs are
labeled A, B and C. The neutral connection (if needed) can be made on terminal block TB1B. If
the model used is an MX30-1, MX30-3Pi, MX45-1 or MX45-3Pi with single-phase capability, the
single phase A output connection is available on TB1B as well. Note that the neutral for either
single or three-phase mode is always located on TB1B. The neutral connection is always
required for single-phase output mode on an MX30-3Pi or MX45-3Pi and may be used if needed
for the EUT for all three-phase output modes.
The external sense inputs allow the power system output voltages to be monitored directly at the
load and must be connected at TB2 when the sense is programmed for external. The external
sense input does not have to be connected when Internal Sense is programmed. The external
sense wires are to be connected to TB2 on the rear panel and should be run using a twisted
shielded cable. See Figure 3-4 for location of TB2 and Figure 3-5 for shield connection detail.
Note:
For External Sense connection, a shielded cable MUST be used with the shield
connected to chassis ground at the Ext. Sense connector. (See Figure 3-5).
External sense is recommended for multi-cabinet systems is the output wiring from the cabinets
to the common output terminal block supplied is not of equal length.
Figure 3-5: External sense cable shield connection to chassis ground
Note:
The output of the power source is isolated from the input line and floating with
respect to chassis ground. If needed, either side (HI or LO) may be grounded.
If the EUT changes frequently, you may want to consider using some quick disconnect scheme
external to the MX so it will not be necessary to power down the MX and remove the front
MX Series
45
covers. This can take the form of a panel-mounted socket (1 or 3 phase) of sufficient current
and voltage rating. (Not supplied with MX)
The output power cables must be large enough to prevent a total voltage drop exceeding 1% of
the rated output voltage between the power source and the load. Table 3-2 shows the size of
the cables that may be used. Note that wires must be sized to accommodate the maximum
current that is available. This may be a function of the voltage range and phase mode on some
MX models. If the MX has more than one output voltage range, size the wires for the lowest
available voltage range as the currents will be highest in that range.
Cable lengths must not exceed twenty-five (25) feet. For lengths greater than 25 feet, calculate
the voltage drop from the following formula:
2 X DISTANCE X CABLE RESISTANCE PER FT. X CURRENT = VOLT DROP
Table 3-2: Suggested Output Wiring Sizes *
Load Current
Wire Gauge (US)
Circular Mils
(kcmils)
Metric (mm2)
65 AMPS
130 AMPS
260 AMPS
400 AMPS
6 AWG
4 AWG
1/0 AWG
2/0 AWG
26.24
41.74
105.6
133.1
13.3
21.1
53.5
67.4
Note:
MX Series
Use high temperature rated wire. Always consult the National Electrical Code
and/or local code regulations for proper rating and size of wire cabling prior to
installation.
46
Output Terminal Blocks
The MX30-3, MX30-3Pi, MX45-3 and MX45-3Pi have two output terminal blocks, TB1A and
TB1B. The MX45-1 only has one output terminal block, TB1B. The terminal blocks are large
enough to accommodate the recommended wire gauge sizes shown in Table 3-2. The terminal
blocks are located in the lower right corner on the front of the unit. The front panel needs to be
removed to access these terminal blocks.
CAUTION: REMOVE ALL INPUT POWER TO THE MX BEFORE REMOVING
THE FRONT PANEL.
The correct standard size Allen wrenches for connecting output wiring to TB1A and/or TB1B are
supplied with each MX in the ship kit. Look for a brown envelope. If the correct tools cannot be
found, contact AMETEK Programmable Power customer service at
[email protected] .
Terminal block TB1B always provides the output neutral connection, regardless of the phase
mode (1 or 3 phase output mode).
In single-phase mode, phase A output is provided through terminal 1 of TB1B.
In three-phase mode, phase A, B and C outputs are provided trough terminals 1, 2 and 3 of
TB1A respectively.
Connector
Terminal
TB1A
TB1B
Mode
Output
1
3 Phase
Phase A
2
3 Phase
Phase B
3
3 Phase
Phase C
1
1 Phase
Phase A
2
1 and 3 Phase
Neutral
Table 3-3: Output Terminal connections.
MX Series
47
Figure 3-6: Location of Output Terminals (Front view)
3.6.2 MX45-1, MX30-1, MX30-3Pi and MX45-3Pi 1 ø mode Output Wiring Diagram
Figure 3-7 shows the required output connections for a MX30-1, MX45-1, MX30-3Pi or MX453Pi in single-phase mode output configuration (rear-view perspective). See section 3.6.3 for the
MX30-3Pi or MX45-3Pi in three-phase mode.
Always disconnect all input power from the MX before removing the front panel cover that
provides access to the input and output terminal connections. Route the wires from the back of
the MX to the front in the provided cable guides.
MX Series
48
Figure 3-7: MX30-1 / MX45-1 Output Wiring (Rear view)
MX Series
49
3.6.3 MX30-3, MX45-3, MX30-3Pi and MX45-3Pi 3ø mode Output Wiring Diagram
Figure 3-8 shows the required output connections for a MX30-3, MX45-3 three phase or an
MX30-3Pi and MX45-3Pi in three-phase mode output configuration (rear-view perspective). See
section 3.6.2 for the MX30-3Pi or MX45-3Pi in single-phase mode.
Always disconnect all input power from the MX before removing the front panel cover that
provides access to the input and output terminal connections. Route the wires from the back of
the MX to the front in the provided cable guides.
Figure 3-8: MX30-3 / MX45-3 Output Wiring (Rear view)
MX Series
50
3.6.4 MX60 or MX90 Output Wiring Diagram
Figure 3-9 shows the required output connections for a MX60-3 or MX90-3 three phase output configuration (rear-view perspective).
Always disconnect all input power from the MX60 or MX90 before removing the front panel cover that provides access to the input and
output terminal connections. Route the wires from the back of the MX30 or MX45 chassis to the front in the provided cable guides. MX60,
MX90 and MX135 systems are shipped with external output terminal blocks that enable the output wiring from two or three chassis to be
combined, providing a single point of connection to the EUT. These blocks are not enclosed however.
Figure 3-9:MX60, MX60-MB, MX90 or MX90-MB Output Wiring (Rear view)
MX Series
51
Figure 3-10: Two MX's in Clock and Lock mode Output Wiring (Rear view)
MX Series
52
3.6.5 MX135 Output Wiring Diagram
Figure 3-11 shows the required output connections for a MX135-3Pi or MX135-3Pi-MB three phase output configuration (rear-view
perspective). Always disconnect all input power from the MX135 before removing the front panel cover that provides access to the input
and output terminal connections. Route the wires from the back of the MX45 chassis to the front in the provided cable guides. Note that
the master is shown in the center in this drawing. MX60, MX90 and MX135 systems are shipped with external output terminal blocks that
enable the output wiring from two or three chassis to be combined, providing a single point of connection to the EUT. These blocks are
not enclosed however.
MX Series
53
Figure 3-11: MX135 or MX135-MB Output Wiring (Rear view)
MX Series
54
Figure 3-12: Three MX's in Clock and Lock mode - Output Wiring (Rear view)
MX Series
55
3.6.6 MX180, MX225, and MX270 Output Wiring Diagram
Figure 3-11 shows the required output connections for a MX180-3Pi through MX270-3Pi three phase output configuration (rear-view
perspective). For MX180, only 4 cabinets are used and for MX225 only 5 but otherwise the wiring diagrams are the same so only the
complete MX270-3Pi configuration is shown.
Always disconnect all input power from the MX180, MX225 or MX270 before removing the front panel cover that provides access to the
input and output terminal connections. Route the wires from the back of the MX45 chassis to the front in the provided cable guides.
For any of these system configurations, it is recommended to use the optional wiring junction box (P/N 7003-416-1). See section 3.13 for
details. All output wires must be of equal length so it is advisable to place the master unit at or near the physical center of the set of units.
MX Series
56
Figure 3-13: MX180, MX225 or MX270 Output Wiring (Rear view)
MX Series
57
3.6.7 Multi-Chassis Output Connections
If two or more MX chassis are used to form a single power system, the outputs of all chassis
need to be combined (paralleled by phase). This can be done directly at the EUT if convenient
or using the provided heavy-duty terminal blocks. Two blocks are provided with multi-chassis
MX systems, one 2-position block and one 3-position block. These blocks allow up to four wires
to be combined into one larger wire gauge size wire. The outputs of the 2 or 3 MX chassis are
connected on one side of these blocks (Phase A,B and C into the 3 position terminal and the
neutral into the 2 position terminal.). The EUT can be connected to the other side. Note that the
wire size to the EUT should be sized up to accommodate the double or triple currents per
phase.
The dimensions of the supplied terminal blocks are shown in Figure 3-14.
Note that even if the EUT is a three-phase delta input, the output neutrals of the MX chassis'
must be connected together for the system to work correctly.
Figure 3-14: Ship kit Terminal Block dimensions
MX Series
58
3.7 Connectors - Rear Panel
A number of connectors are located along the top rear covers. These connectors are in a
recessed area to protect them from shipment damage.
3.7.1 System Interface
WARNING: The system interface connectors are for use with AMETEK Programmable
Power supplied cables, and only between California Instruments equipment.
The Clock and Lock BNC connectors located on the rear panel are used to synchronize and
control the phase shift between the three outputs when 3 units are operating as a three-phase
clock and lock system. This mode of operation requires the -LKM (on Master unit) and -LKS (on
Auxiliary units) options. See paragraph 3.10 for more information on this mode of operation.
A set of two identical System Interface connectors, P8 and P9 is located on the rear panel of
each MX chassis. The system interface is used to connect the multiple MX30 or MX45 power
sources in a Master/Auxiliary configuration to create MX60, MX90 or MX135 models. In these
configurations, only the Master MX30 or MX45 power source has a built-in controller and front
panel.
The same connector is also used to control the optional OMNI-3-75 Reference Impedance.
P8 / P9
MX Series
Description
1
OUTP:
Output ON. Controls state of output relay
2
N/C
3
N/C
4
N/C
5
COM:
Common. Signal return.
6
OT:
Over temperature. Indicates over temperature condition.
7
N/C
8
CLB:
Current Limit B. Programmed current limit reference for phase B
9
CSA:
Current Sum Phase A
10
CSC:
Current Sum Phase C
11
FLT A:
Amplifier Fault Phase A
12
FLT C:
Amplifier Fault Phase C
13
XFMR:
Optional voltage range select. (-HV or -XV option)
14
PARALLEL: Parallel operation control.
15
INPUT ON: Input power status
16
A ERR LO: Error Signal Phase A, low
17
B ERR HI: Error Signal Phase B, high
18
N/C
19
C ERR LO: Error Signal Phase C, Low
59
P8 / P9
Description
20
300 VRNG: 300 V AC Range Select
21
COM:
22
/REM OFF: Remote Off Control not
23
COM:
Common. Signal return
24
FLK/BYP:
Flicker / Bypass OMNI control
25
/OVL:
Overload not
26
CLA:
Current Limit A. Programmed current limit reference for phase A
27
CLC:
Current Limit C. Programmed current limit reference for phase C
28
CSB:
Current Sum Phase B.
29
N/C
30
FLT B:
31
N/C
32
DC:
DC mode control
33
INP OFF:
Input power control
34
A ERR HI: Error Signal Phase A, high
35
N/C
36
B ERR LO: Error Signal Phase B, low
37
C ERR HI: Error Signal Phase C, high
Common. Signal return.
Amplifier Fault Phase B
Table 3-4: System Interface Connectors
3.7.2 Analog Input Connector
Input screw-terminal strip. Functions are called out on rear panel decal. Table shows
connections from left to right when standing at the rear of the MX cabinet.
Pin
Description
1
RPV HI.
INPUT: Analog input for External Modulation
2
RPV Lo.
INPUT: return.
3
EXT SYNC HI
INPUT: Analog input for external sync mode.
4
EXT SYNC Lo
INPUT: return.
5
RI:
INPUT: Remote Inhibit. (See paragraph 3.12.)
6
RI:
INPUT: return.
Table 3-5: Analog Interface Connector
MX Series
60
3.7.3 BNC Connectors
BNC connectors. Functions are called out on rear panel decal. Table shows connections from
left to right when standing at the rear of the MX cabinet.
Table 3-6: BNC Connectors
BNC
Description
1
Trigger Input (TTL input)
2
Trigger Output (TTL output) (Same signal connection as Function Strobe. Some units
may not have this output connected. If you don’t get an output trigger on this BNC, use the
Function Strobe BNC instead.)
3
Function Strobe (TTL output) (Same signal connection as Trigger Output)
4
Clock (TTL output on Master / TTL input on Auxiliary)
5
Lock (TTL output on Master / TTL input on Auxiliary)
6
Emergency Shut off inter connect. Installed only on –MB systems with –ES Option.
Table 3-7: BNC Connectors
3.7.4 External Sense Connector
Pin
Description
1
Phase A sense
2
Phase B sense
3
Phase C sense
4
Neutral sense
Table 3-8: External Sense Connector
MX Series
61
3.7.5 RS232C Serial Interface Connector
An RS232 serial interface connector is located on the rear panel on all models. Note that two
versions of the RS232 exist on the MX model series depending on the age of the unit. Older
models can be identified by the fact that they will not have a USB interface.
Pin
Name
Direction
1
N/C
2
TxD
Output
3
RxD
Input
4
N/C
5
Common
6
N/C
7
CTS
Input
8
RTS
Output
9
N/C
Common
Table 3-9: RS232 Connector pin out – MX with RS232 and USB.
Pin
Name
Direction
1
N/C
2
RxD, Receive data
Output
3
TxD. Transmit data
Input
4
DTR, Data Terminal Ready
DTR, Data Terminal Ready
5
Common
Common
6
N/C
N/C
7
RTS, Request to Send
Output
8
N/C
N/C
9
N/C
N/C
Table 3-10: RS232C Connector pin out – MX with RS232 but no USB
On MX models without a USB interface, a special RS232 cable is required to connect to a PC.
With these MX models, a special 13 foot / 4 meter long cable is supplied in the MX Series shipkit. The wiring diagram for this cable is shown below in case a longer cable has to be
constructed. Alternatively, a generic straight thru DB9 male to DB9 female cable can be used to
extend the supplied cable.
MX models that have both RS232 and USB interface use a more common straight through DB9
male to DB9 female serial cable, which is supplied in the MX ship kit for these models.
MX Series
62
DB-9 PC
Pin
1
2
3
4
5
6
7
8
9
DB-9 AC Source
Pin
1
2
3
4
5
6
7
8
9
Direction
output
input
output
output
input
output
Description
reserved
Receive data(RxD)
Transmit data (TxD)
Data Terminal Ready (DTR)
Signal Ground
Data Set Ready (DSR)
no connect
no connect
reserved
Figure 3-15: RS232C Cable for PC Connection wiring diagram – MX without USB.
MX Series
63
3.7.6 USB Interface
A standard USB Series B device connector is located on the rear panel for remote control. A
standard USB cable between the AC Source and a PC or USB Hub may be used.
Note:
Use of the USB port to control more than one power source from a single PC is
not recommended, as communication may not be reliable. Use GPIB interface for
multiple power source control.
Figure 3-16: USB Connector pin orientation.
Pin
1
2
3
4
Name
VBUS
DD+
GND
Description
+5 VDC
Data Data +
Ground
Table 3-11: USB Connector pin out.
MX Series
64
3.7.7 LAN Interface – RJ45
An optional RJ45 Ethernet 10BaseT connector is located on the rear panel for remote control. A
standard RJ45 UTP patch cord between the AC Source and a network Hub may be used to
connect the AC source to a LAN. For direct connection to a PC LAN card, a crossover RJ45
cable is required. Consult your network administrator for directions on connecting the AC source
to any corporate LAN.
If the –LAN Ethernet interface option is present, the MAC Address (Media Access Control) of the
Ethernet port is printed on the serial tag of the power source. The serial tag is located on the
rear panel of the unit.
For information on how to set up a network connection or a direct PC connection using the LAN
interface, refer to the MX Series Programming Manual P/N 7003-961 distributed in Adobe PDF
format on CD ROM CIC496.
LAN
Pin
1
2
Ethernet TPE
10BaseT/100BastT/1000BaseT
Transmit/Receive Data 0 +
Transmit/Receive Data 0 -
3
4
5
6
Transmit/Receive Data 2 Transmit/Receive Data 1 -
7
8
Transmit/Receive Data 3 -
EIA/TIA 568A
White with green stripe
Green with white stripe or
solid green
White with orange stripe
Blue with white stripe or
solid blue
White with blue stripe
Orange with white stripe
or solid orange
White with brown stripe or
solid brown
Brown with white stripe or
solid brown.
EIA/TIA 568B
Crossover
White with orange stripe
Orange with white stripe or
solid orange
White with green stripe
Blue with white stripe or
solid blue
White with blue stripe
Green with white stripe or
solid
White with brown stripe or
solid brown
Brown with white stripe or
solid brown
Table 3-12: RJ45 LAN Connector pin out.
MX Series
65
3.7.8 ES Option - Emergency Switch Interconnect for –MB systems – BNC
An optional BNC connector is located on the rear panel for connecting multiple chassis, each
having a controller and an emergency shut off switch (-ES option). This connection is required
to create an OR-ed operation of more than one –ES switch.
This connector is only present on MX-MB systems with the –ES option. If present, a suitable
BNC cable should be used to connect the emergency shut off signal between chassis. This
connector is labeled as follows:
"Caution: BNC cable must be connected for system Emergency Shut-Down"
See figure below for an illustration of a MX90-MB-ES interconnect.
Figure 3-17: Emergency Switch (ES Option) shut off inter connect on -MB systems.
MX Series
66
3.8 Multiple Cabinet System Configurations (incl. –MB)
Multi-cabinet MX models consist of two or three autonomous or Auxiliary MX45-3Pi units.
Auxiliary units do not have their own controller and are identified easily by their blank front panel
(except for status indicator LEDs). Master units each have their own controller but can be
configured as auxiliary units by disconnecting the ribbon cable marked J17 between the
controller and the system interface board (P/N 7003-700-1 or P/N 7003-715-1). This disables
the controller and allows the MX45 to operate as an Auxiliary unit. (Requires removal of the top
cover). See section 4.2.11.5 for information on setting the SYSTEM field in the configuration
menu when changing configurations on MX systems with the –MB (Multi-box) option.
When used as a multi-cabinet system for higher power applications, the controllers in the unit(s)
acting as the auxiliary to the master are either disabled or not present. For normal system
configurations such as MX90-3Pi, the auxiliary unit will not have a controller or front panel and
will have been factory configured for auxiliary operation.
For –MB systems such as MX90-3Pi-MB, the controller in the auxiliary unit must be disabled
using S1. The SYSTEM field in the master unit controllers CONFIGURATION SETUP 3 screen
must be set to the correct system configuration setting as well. The SYSTEM field for the
controller in the auxiliary unit must be set to AUX if it is used as an auxiliary unit. See section
4.2.11.5.
Note:
New SYSTEM field configuration settings do not take effect until power is cycled.
In addition to disabling the controller if present (as described above), the DIP switch (S1) located
on the GPIB / RS232C / IO assembly in the auxiliary cabinets. (Requires removal of the top
cover). The correct switch settings are shown below. (shown set for Master cabinet). Note that
all units must be powered down before reconfiguring. Also, the output wiring must be changed to
accommodate the new configuration.
Note:
If the units being re-configured for multi-cabinet operation were not factory
configured this way, it may be necessary to balance the amplifiers by adjusting
their gain. Refer to section 6.4 for details on Amplifier balancing.
When used as a multi-cabinet system, the system interface cables must be connected between
the master and the auxiliary cabinets.
Note:
MX Series
If the –MB system has the –ES emergency shut off switch option, it is required to
connect the ES BNC’s between master chassis. See section 3.7.8.
67
Top View
from back of MX
chassis
Interface Board
Detail
view
DIP S1
S1
MASTER
AUX
SINGLE-CAB
MULTI-CAB
1 2 3
4
MODE
Figure 3-18: Multi-Cabinet DIP Switch Location and Setting
MX Series
68
3.9 Multiple Cabinet Power Up/Down Procedures
For all multi-cabinet MX Series configurations (MX60, MX90, MX135, MX180, MX225 and
MX270), the following Power Up (Turn on) and Power Down (Turn off) procedures should be
observed.
3.9.1 Power Up Procedure
Follow these steps:
1. Turn on each of the Auxiliary units using the front panel circuit breaker, one at a time.
The exact order for turning on the auxiliary units is not important. Note that the bias
supplies of each of the auxiliary cabinets will power up but not the actual amplifiers. This
is because the auxiliary units are waiting for the turn on signal from the master unit.
2. Once all auxiliary units are on, turn on the MASTER unit LAST using the front panel
circuit breaker. The master unit will go through an initialization process and power up
itself plus the auxiliary units.
3. Allow 20 to 30 seconds for the turn on sequence to complete before attempting to
communicate with the system.
3.9.2 Power Down Procedure
The power-down / shutdown sequence for the system is the reverse of the power-up / turn-on
sequence. This means the MASTER unit is turned off FIRST. Once the MASTER shuts down,
all auxiliary units’ main AC input power contactors will open up automatically. They still need to
be turned off individually using the front panel circuit breaker. This will shut down their bias
supplies as well.
Follow these steps:
1. Disconnect the EUT by opening the MX output relay. Use the Output On/Off button on
the master unit front panel or send the “OUTPUT 0” command over the bus to do so.
2. Turn off the MASTER unit FIRST using the front panel circuit breaker. The master unit
will disengage the main AC power input contactors of all auxiliary units at this time.
3. Next, turn off each of the Auxiliary units using the front panel circuit breaker, one at a
time. The exact order for turning off the auxiliary units is not important.
MX Series
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3.10 Clock and Lock Configurations
The MX Series may optionally be equipped for clock and lock mode of operation. This mode is a
special form of Master/Auxiliary, which requires each chassis to have its controller. As such, it is
possible to create 2, 3, 6 or 9 phase power systems using 2 to 3 MX chassis. For most 2 or 3
phase configurations, the normal multi-box mode of operation as described in section 3.8 is
recommended as it provides a single controller (and GPIB/RS232 control interface).
In a clock and lock configuration, each unit has its own front panel controls (as well as individual
GPIB and RS232C interfaces) for operating the supply but the output frequency of the auxiliary
unit(s) (-LKS option) is synchronized (locked) tot he Master MX unit (-LKM).
This mode of operation requires that one MX has the -LKM (Lock Master) option and one or two
MX units have the -LKS (Lock auxiliary) option.
3.10.1 Clock/Lock Configuration Settings
Clock and lock configuration. settings for -LKM and -LKS equipped MX's are set at the factory at
the time of shipment and cannot be changed. To check the configuration settings for an MX,
select the UTILITY2, CONFIGURATION screen. In the configuration screen, the CLK/LOC entry
determines if the unit is a Master or Auxiliary as follows:
CONFIGURATION 2
Field
Parameter
Description
CLK/LOC
N/A
Stand alone MX or MX-LKM clock and lock
master.
Frequency mode is set to either INT (internal
= default) or SYNC (external sync).
ON
Auxiliary MX.
Frequency mode selection is INT (internal =
for stand alone use) or EXT (external for
Clock and Lock mode operation.)
Table 3-13: Clock and Lock Configuration settings
Note that the actual mode of operation of a Clock/Lock MX-LKM auxiliary unit is determined by
the Clock mode set in the PROGRAM2 screen. For clock and lock mode of operation, the
master is set to INT and the Auxiliary to EXT.
MX Series
70
3.10.2 Clock/Lock Initialization Settings
The mode of operation of the MX-LKS auxiliary unit is determined by the Clock mode set in the
PROGRAM2 screen. Since most clock and lock systems are permanently used in this
configuration, the clock mode can be set to EXT (External) at power on by using the INITIAL
SETUP3 screen.
Available initial settings and their relationship to the Clock and Lock mode of operation are
shown in the table below.
INITIAL SETUP 3
Field
Parameter
Description
CLK/LOC
STAND
Normal stand alone mode of operation. For
standard MX power source with no clock and
lock mode of operation.
MASTER
For master (-LKM) power source in clock and
lock mode of operation.
AUX
For auxiliary (-LKS) power source in clock and
lock mode of operation. Powers up with clock
mode set to external.
Table 3-14: Clock and Lock Initialization settings
3.10.3 Clock/Lock and External Sync Mode
Note that an MX-LKM auxiliary unit is factory configured to operate in Clock and Lock mode
when EXT clock mode is selected in the PROGRAM2 screen. This means that a MX-LKS
cannot be used in normal external sync mode. However, the MX-LKM master unit can be
operated in external sync mode.
Furthermore, since the MX-LKM master unit is factory set for Master mode of operation, it in turn
cannot be used as an Auxiliary source in a clock and lock configuration.
3.10.4 Remote Programming of Clock and Lock systems
Since clock and lock systems have multiple autonomous controllers that are synchronized in
frequency, remote programming of these systems requires that the application program deals
with all MX controllers. This often precludes the use of RS232C as generally not enough serial
ports are available. The use of GPIB instead also offers the advantage of using the Group
Execute Trigger (GET) capability to effect output changes on all phases (MX's) simultaneously
which is otherwise difficult to do.
To set up a GPIB remote controlled clock and lock systems, the GPIB addresses for the
individual MX's must be set to different address values in the UTILITY1, GPIB/RS232 SETUP
screen.
Note:
MX Series
This mode of operation is not supported by the MXGUI Windows software
supplied with each MX unit.
71
3.11 Basic Initial Functional Test
CAUTION:
Work carefully when performing these tests; hazardous voltages
are present on the input and output during this test.
Refer to Figure 3-19 for the required functional test set up. Proceed as follows to perform a
basic function check of the power system:
1. Verify the correct AC line input rating on the nameplate of the MX unit(s) and make sure the
correct three-phase line voltage is wired to the input of the MX before applying input power.
2. Connect a suitable resistive or other type load to the output of the MX. The load resistance
value will depend on the voltage range you plan to check. Make sure the power resistor has
sufficient power dissipation capability - up to 15 KW for full load test on one phase of MX453 or 10 KW for full load test on one phase of M30-3Pi - and that the load used does not
exceed the maximum power rating of the MX. For three phase configurations, this test can
be performed on one phase at a time if needed.
3. Connect an oscilloscope and DMM / voltmeter to the AC source output. Set both for AC
mode.
4. If the correct voltage is present, turn on the MX unit(s) by closing the On/Off circuit breaker
on the front panel. For multi-cabinet systems, turn on the auxiliary unit first and wait for
them to cycle on, then turn on the master unit.
5. If the MX has more than one available output voltage range, go to the PROGRAM 1 screen
and select the desired voltage range. The output mode can be set from the PROGRAM 2
screen (use the MORE soft key or press the PROGR function key again). Select AC mode.
6. Set the output voltage to 0 volt and close the output relay with the OUTPUT ON/OFF button.
There should be little or no output although the DMM may show a noise level, especially if
the DMM is in auto ranging mode.
7. Move the cursor to the VOLTAGE field in the PROGRAM 1 screen and either use the
keyboard to program a small voltage (20 VAC) or slew the voltage up slowly with the knob.
Observe the DMM reading. The reading should track the programmed voltage.
8. Also monitor the scope. The output should be a sinusoidal voltage waveform.
9. If the output tracks, increase the voltage till you reach 80 % of the voltage range or more.
Check the output voltage reading and waveform.
10. Select the MEASUREMENT 1 screen by pressing the MEAS button. The output voltage,
current and power will be displayed. For three phase configurations, use the PHASE button
to select the øABC display mode. This will show the voltage, current and power for all three
phases. If all phases are loaded equally, the same current and power should be visible for
all three unless the voltages are not programmed to the same level. If only one phase is
loaded, current and power will only be shown for the loaded phase.
MX Series
72
In the unlikely event the power source does not pass the functional test, refer to the calibration
procedure in Section 6 or call California Instrument’s customer satisfaction department for
further assistance.
AC Line
(Rear view)
3ø
AC Line
Input
Connect
A, B or C
Scope
DMM
Power
Resistor
15 kW
Figure 3-19: Functional Test Setup.
MX Series
73
3.12 Remote Inhibit / Remote Shutdown
It may be necessary to provide a remote shutdown of the AC or DC output of the MX. The
external remote inhibit input may be used for this purpose (RI). This input is also referred to as
remote shutdown.
The default mode of operation for the RI input is a contact closure between pins 5 and 6 (return)
of the rear panel screw-terminal strip. This will open the output relay of the MX.
If the firmware revision of the MX is 0.28 or higher, it is possible to reverse the polarity of the RI
input. This requires the use of the following bus command:
OUTPut:RI[:LEVel] HIGH
/* Sets RI polarity to active high.
OUTPut:RI[:LEVel] LOW
/* Sets RI polarity to active low (Factory default)
The remote control interface must be used to change this setting. Once set, the polarity setting
remains in effect. On units with firmware rev 0.27 or lower, this input level mode selection is not
available.
MX Series I
When set to HIGH, an active low TTL level or a contact closure is required to enable the output
relay of the MX. Opening the contact or removing the low input signal will cause the output relay
to open.
MX Series II
The way the MX responds to a remote inhibit event can be programmed over the remote control
interface using the OUTP:RI:MODE command. See 7003-961 programming manual for details
on changing modes. The mode set is retained at power off and recalled at power up so stays in
effect till changed again over the bus.
The following modes are supported.
MODE
OPERATION
LATCHING
A TTL low at the RI input latches the output in the
protection shutdown state. This state can only be
cleared by sending a OUTPut:PROTection:CLEar
command over the bus.
LIVE
The output state follows the state of the RI input. A TTL
low or contact closure at the RI input turns the output
off; a TTL high or open contact turns the output on.
This mode is equivalent to using the Output On/Off
button on the front panel.
Default mode. Units are shipped in this mode.
OFF
The instrument ignores the RI input.
Table 3-15: Remote Inhibit Mode Settings
NOTE: When using the Remote Inhibit input, it will be necessary to disconnect any RI
connection to the MX master unit when turning on the MX master unit. During
initialization, the RI connection must be OPEN or initialization will be halted with
the message WARING FOR AUXILIARY displayed on the LCD screen.
MX Series
74
3.13 Junction Box Accessory
An optional wiring junction box (P/N 7003-416-1) is available which may be used to connect the
outputs of 2 to 6 MX cabinets together. The junction box also has a protective ground
connection, which MUST be connected to a suitable protective earth ground.
Each junction box has four sets of terminals for phase A, phase B, phase C and Neutral. Each
terminal is lined up with a strain relief on each side. The outputs from the MX45 cabinets
connect to the “MX SYSTEM OUTPUT” side of these terminal blocks. The load can be
connected to the “LOAD”. Note that the wiring is not supplied with the system and must be
provided by the end user. The wire gauge of the load connection must be sized to handle the
maximum current in the low voltage range of operation.
The “MX SYSTEM OUTPUT” side of the terminal block will accept up to 8 wires. If the external
sense connection is made at the junction box, one of these can be used to connect the sense
wiring.
Note: Do not swap output load wires or sense wires between phases, as damage to the system
will result.
The “LOAD” side will accept 2 wires. The wire size range shown in Figure 3-20 refers to
mechanical compatibility of terminal block only. This information does not reflect required wire
size. The wire sizes accepted by the terminal blocks of the junction box on each side are shown
in Figure 3-20.
Figure 3-20: 7003-416-1 Output Junction Box
Dimensions 7003-416-1:
W x L x H Chassis
Feet height:
Strain relief hole size:
MX Series
12.125 “ x 16.125” x 4.125”
0.875
1.5” diameter
308 x 410 x 105 mm
22 mm
38 mm diameter
75
3.14 Output Filter Box Accessory
An optional output filter box (P/N 7003-424-1) is available which may be used reduce the
amount of ripple and noise present at the output of the MX30/45-3Pi.
The filter must be connected between the three-phase output of the MX30/45 and the unit under
test. To access the connection terminal blocks, the top cover of the filter case must be removed.
Note:
Make sure all power is off when connecting the filter accessory.
The output of the MX30/45 is connected to the input side of the filter. Use terminal blocks TB1A
(phases A and B) and TB1B (phase C and neutral) as indicated in Figure 3-21. The load can be
connected to the load side of the filter box using terminal blocks TB2A and TB2B. Do not swap
phases through the filter.
To compensate for voltage drop across the filter, the external sense connections can be made
at the load (load side of the filter).
Note:
The filter box chassis must be connected to earth ground.
It is not recommended to use the ground connection on the MX30//45 itself for this purpose but
rather a ground point at the AC service to the MX30/45.
Figure 3-21: 7003-424-1 Output noise filter box.
W x L x H Chassis
Feet height:
MX Series
12.125 “ x 16.125” x 4.125”
0.875
1.5” diameter
308 x 410 x 105 mm
22 mm
38 mm diameter
76
3.15 Fuse Box Accessory
An Output Fuse Box (P/N 7003-426-1) is provided with MX systems consisting of more than 2
cabinets. This fuse box provides protection against excessive current circulating between
amplifiers in different chassis in case of a system malfunction.
Each fuse is capable of sustaining up to 125 Arms of AC current, which is the maximum
available current per MX amplifier.
Each fuse box has 9 sets of 3 fuses for phase A, phase B and phase C. Each fuse terminal is
lined up with a strain relief on each side of the box. The outputs from the MX45 cabinets connect
to the “MX 45 SOURCE” side of fuse box. The outputs of the fuse box (marked “JUNCTION
BOX” are normally routed to the 7003-416-1 Junction box (marked “MX SYSTEM OUTPUT”)
where the outputs of the various cabinets are combined for each phase. The load can then be
connected to the “LOAD” side of the junction box.
Note:
The Fuse box enclosure must be connected to Earth ground using the provided
ground stud.
Figure 3-22: 7003-426-1 Output Fuse Box
W x L x H Chassis
Feet height:
MX Series
12.125 “ x 16.125” x 4.125”
0.875
1.5” diameter
308 x 410 x 105 mm
22 mm
38 mm diameter
77
4. Front Panel Operation
4.1 Tour of the Front Panel
The MX Series with type P or type Pi have identical front panels although some of the keys
found on the front panel are only used by MX models with the 3Pi controller. If your unit is a P
type controller, these keys will act as don’t cares. This chapter provides information on operating
the MX with either controller type.
Before operating the AC source using the front panel, it helps to understand the operation of the
front panel controls. Specifically, the operation of the knob, keyboard and the menu layout are
covered in the next few paragraphs.
4.1.1 Front Panel Controls and Indicators
The front panel can be divided in a small number of functional areas:
•
Mains circuit breaker
•
Status Indicator lights
•
Shuttle knob
•
LCD display
•
FUNCTION keypad
•
DATA ENTRY keypad
4.1.2 System On/Off Circuit Breaker
The circuit breaker located on the bottom left side of the front panel disconnects the low voltage
supply of the MX Source from the three phase Line input. This will remove power from the mains
AC input contactor and thus remove input power from the MX Series power source. As such,
the circuit breaker acts as an indirect power on/off switch for the MX Series unit. Note however
than AC input power remains applied to the primary side of the input transformer.
When the input current rating of the MX Series AC power source is exceeded, the protective
fuses (F1 through F3) will blow. In this case, power to the low voltage supply may still remain
through the front panel circuit breaker. In this case, the on/off circuit breaker should be opened
(power off) first followed by a complete disconnect of all ac input power through an installed
main circuit breaker.
Note that in MX60, MX90 and MX135 systems, each unit has its own on/off circuit breaker and
set of line input fuses.
MX Series
78
4.1.3 Status Indicator Lights
Four LED status indicators are located directly above the mains circuit breaker. These LED’s
correspond to the following conditions:
REMOTE
The REMOTE LED indicates that the unit is in remote control
mode. If the IEEE-488 interface is used, this indicator will be lit
whenever the REM line (REMOTE ENABLE) line is asserted by
the IEEE controller. If the RS232, USB or LAN interface is used,
the REMOTE state can be enabled by the controller using the
SYST:REM command. Any time the REMOTE LED is lit, the
front panel of the MX Series unit is disabled. There is no
LOCAL button that allows the user to regain control of the front
panel. This prevents accidental change of settings in ATE
applications.
OVERLOAD
The OVERLOAD LED indicates an output overload condition.
This condition can be controlled by setting the current limit
value in the PROGRAM menu. Removing the load using the
OUTPUT ON/OFF button will recover from an overload
condition.
OVER TEMPERATURE
The OVER TEMPERATURE LED indicates an overheating
problem inside the unit. This is an abnormal condition, which
will cause the unit to shut off. Check the air openings to make
sure they are not blocked.
HI RANGE
The HI RANGE LED is on when the high voltage output range
has been selected.
MX Series
79
4.1.4 The Shuttle Knob
Counter
Clock
wise
DECR
Clock
wise
INCR
Figure 4-1: Shuttle Knob
The shuttle knob is located to the right of the LCD screen and is used to change setup
parameters. Note that it cannot be used to move the cursor position between menu fields. Use
the UP and DOWN arrow keys in the FUNCTION keypad for this.
The shuttle knob can operate in one of two distinct modes of operation:
MODE
DESCRIPTION
IMMEDIATE mode
Any time the ENTER key is pressed, the MX Series returns to
its normal mode of operation. In this mode, changes made with
the shuttle knob or the data entry keypad will take immediate
effect. The IMMEDIATE mode is useful for slewing output
values such as voltage and frequency and observing the effect
on the load.
SET mode
When the SET key located in the FUNCTION keypad is
pressed, changes made with the shuttle to any output
parameter will not take effect until the ENTER key is pressed. In
this mode, any changes made to a setup menu will be blinking
to indicate the pending change condition. This mode allows
changes to be made to all output parameters and executing
them all at once by pressing the ENTER key.
MX Series
80
4.1.5 FUNCTION Keypad
The function keypad provides access to all menus and measurement screens. The following
keys are located in the FUNCTION keypad:
FUNCTION
MENU
PROG
WAVE
MEAS
OUTPUT
ON/OFF
PHASE
SET
+/-
Figure 4-2: FUNCTION Keypad
KEY
DESCRIPTION
MENU
The top level menu is accessed by pressing the MENU key.
Three shortcut keys are used to provide direct access to the
PROGRAM, WAVEFORM, and MEASUREMENT screens as
these are among the most frequently used screens. Thus,
instead of going through the main menu to reach the
PROGRAM, WAVEFORM, and MEASUREMENT screens, they
can be accessed directly by pressing the PROG, WAVE, and
MEAS keys respectively. A map of the Main menus is provided
on the next few pages. There are three top level menus in the
MX Series.
PROG
The PROG key is a shortcut to access the PROGRAM menu
directly. The PROGRAM menu is one of the most frequently
used menus. Thus, instead of going through the main menu to
reach the PROGRAM menu, it can be accessed directly by
pressing the PROG key.
WAVE
The WAVE key is a shortcut to access the WAVEFORM screen
directly. The WAVEFORM screen is used to select a user
defined arbitrary waveform.
(3Pi controller only)
MEAS
The MEAS key is a shortcut to access the MEASUREMENT
screen directly. The MEASUREMENT screen is one of the most
frequently used screens. Thus, instead of going through the
main menu to reach the MEASUREMENT screen, it can be
accessed directly by pressing the MEAS key.
MX Series
81
OUTPUT ON/OFF
The OUTPUT ON/OFF key toggles the output relay on or off.
The state of the output relay is reflected by the green LED
located directly to the left of the OUTPUT ON/OFF key. If the
green LED is lit, the output relay is enabled (closed) and the
programmed output voltage is present at the output terminals. If
the green LED is off, the output relay is open and both the
HIGH and LO terminal of the output terminal block are
disconnected from the power source. In this mode, the output is
floating. The ON/OFF button provides a convenient way to
disconnect the load without having to remove any wires.
PHASE
The PHASE key is used to select the phase on a MX30-3Pi or
MX45-3Pi model. Pressing the PHASE key will toggle phase A,
B, C or ABC. Some screens may not support the ABC or show
all phase information in which case this mode is skipped. (3Pi
controller only)
SET
The SET key is used to select the mode of operation of the
shuttle. Refer to section 4.1.1 for details on its operation and
the use of the SET key.
+/-
The +/- key can be used to toggle the sign for those parameters
for which it is relevant. This is typically the output voltage when
in DC mode of operation. For fields that have only two possible
values such as the voltage range field, the +/- key can be used
to toggle between these two values.
MX Series
82
4.1.6 DECIMAL KEYPAD
The decimal keypad may be used to enter any numeric parameter required in any of the menu
fields. Several fields accept input from either the keypad or the knob. Data entered from the
keypad is normally accepted once the ENTER key is pressed unless the front panel mode is in
the SET mode. The following keys are available on the decimal keypad:
ENTRY
7
8
9
4
5
6
1
2
3
0
.
E
N
T
E
R
Figure 4-3: Entering Values from the Decimal Keypad
CURSOR UP
The UP key moves the cursor position upwards one position to
the previous available cursor position. If the present cursor
position is at the top of the right hand column, the cursor is
moved to the bottom position of the left hand column. If the
present cursor is at the top of the left hand column, the cursor is
moved to the bottom of the right hand column. Figure 4-4
depicts the cursor movement through a two column menu.
Figure 4-4: Cursor UP Key Movement
CURSOR DOWN
MX Series
The DOWN key moves the cursor position downwards one
position to the next available cursor position. If the present
cursor position is at the bottom of the left hand column, the
cursor is moved to the top position of the right hand column. If
the present cursor is at the bottom of the right hand column, the
cursor is moved to the top of the left hand column. Figure 4-5
depicts the cursor movement through a two-column menu.
83
Figure 4-5: Cursor DOWN key Movement
The decimal keypad can be used at any time in lieu of the shuttle knob to change output
parameters. Direct data entry is often faster to effect large changes in values than using the
shuttle knob. Note that pressing the ENTER key while in SET mode of operation will cause the
AC source to revert back to IMMEDIATE mode. Thus, to change all parameters in SET mode,
enter a value for each field and then proceed to the next field without pressing the ENTER key.
0 through 9.
The numeric keys provide all decimal number for entry of
parameters.
DECIMAL POINT
The decimal point key is used to enter fractional parts of values
for fields that have a resolution less than 1. The amount of
resolution for each menu field is normally visible on the LCD. If
more digits are entered after the decimal point than can be
accepted by a field, the value is automatically rounded to the
available resolution when the ENTER key is pressed.
BACKSPACE
The BACKSPACE (←) key can be used to erase one digit at a
time if you make a data entry error.
4.1.7 LCD Display
The LCD display of the MX Series power source provides information on instrument settings and
also guides the user through the various menus. To ease reading of the displayed information,
most screens are widely spaced. A sample of the main menu 1 screen that appears when the
MX Series source is powered up is shown in Figure 4-6. Due to the amount of space available
on each screen, some menus have been split into parts. The MORE selection located at the
bottom right hand side provides access to menu choices at the same level that did not fit on a
single screen. Thus, to access MENU 2, the cursor should be placed on the ‘MORE’ selection
followed by pressing the ‘ENTER’ key. Alternatively, the MENU key may be pressed to move to
the MENU 2 screen.
The present cursor position is always shown with a inverse bar. The cursor is located on the
‘MORE’ selection in Figure 4-6. Pressing ENTER would cause MENU 2 to be displayed.
The cursor position can be moved by using the UP and DOWN keys located in the DECIMAL
keypad.
Figure 4-6: Main Menu 1 Screen
MX Series
84
4.2 Menu Structure
The next few pages show a map of the available menus in the MX Series. There are three main
level (level 1) menus from which all other menus can be reached. Frequently used (level 2)
menus have a short cut key that provides direct access. Examples of such menus are Program,
Measurements, and Waveform. In any case, there are never more than three levels of menus
although some menus may be spread across more than one screen.
4.2.1 MAIN Menus
Figure 4-7: Menu 1 through 3
The top-level menu is split in three parts, MENU 1 through MENU 3 to allow spacing between
menu entries. MENU 2 and 3 can be reached from MENU 1 by selecting the MORE entry or by
pressing the MENU key repeatedly, which will toggle from MENU 1 to 2 to 3 and back to 1. The
division of menu choices between the two screens is graphically illustrated in 4.2.2 by the boxes
in level 1. Each box represents one screen. Subsequent screens can be reached using the
MORE entry.
MX Series
85
The following top-level menu choices can be accessed from the MENU key:
Entry
Description
MENU 1
PROGRAM
The PROGRAM menu allows output parameters the be
changed.
MEASUREMENTS
The MEASUREMENTS screens are not menus in that no user
entries are required.
TRANSIENTS
The TRANSIENTS menu allows output transients to be
programmed.
WAVEFORMS
The WAVEFORMS menu allows different waveforms to be
selected from the waveform library.
MORE
The MORE selection causes the second part of the MENU
screen to be displayed. (MENU 2)
MENU 2
ADVANCED MEAS.
The ADVANCED MEAS. screens are for display only. No user
entries are required.
APPLICATIONS
The APPLICATIONS menu provides access to the optional
firmware application programs that may be installed in the MX
Series AC source.
SETUP REGISTERS
The SETUP REGISTERS menu allows complete instrument
settings and transient list programs to be saved to nonvolatile
memory.
MORE
The MORE selection causes the third part of the MENU screen
to be displayed. (MENU 3)
MENU 3
UTILITY
The UTILITY menu provides access to less commonly used
setup screens such as those for the GPIB and RS232C (also
applies to USB and LAN) interface settings, initial startup
values, etc.
OUTPUT IMPEDANCE
The OUTPUT IMPEDANCE menu provides control of the AC
source output impedance. (MX30-3Pi or MX45-3Pi model
only)
MEASUREMENT CAL
The MEASUREMENT CAL menu allows for calibration of the
AC source measurement system.
OUTPUT CAL
The OUTPUT CAL menu allows for calibration of the AC source
output.
Following the Menu overview pages is a detailed description of each menu and sub menu.
MX Series
86
4.2.2 Overview of Menu 1
level 1
MENU 1 PROGRAM
level 2
level 3
PROGRAM1
VOLTAGE
FREQ
VOLT RANGE
CURR LIMIT
MORE
PROGRAM2
PHASE
CLOCK MODE
VOLT MODE
DC OFFSET
START ø
MEASUREMENTS
MEASUREMENTS1
VOLTAGE
CURRENT
FREQ
POWER
MORE
MEASUREMENTS 2
VA POWER
PEAK CURR
POWER FACT
CREST FACT
PEAK CURR RESET
MEASUREMENTS 3
VOLT THD
CURR THD
INST PK CURR
PHASE
HARMONICS/TRACE
ANALYSIS
FUNCTION
VIEW
DATA MODE
SCALE
TRIG MODE
TRIG SOURCE
TRIG PHASE
TRIG DELAY
START
TRANSIENTS
VOLT SURGE/SAG
VOLT SWEEP/STEP
FREQ SWEEP/STEP
VOLT/FREQ SWEEP/STEP
START/VIEW SEQUENCE
PREVIOUS SCREEN
START
PAUSE
DURATION
END VOLT
END FREQ
DURATION
END FREQ
END DELAY
FUNCTION
START ø
END VOLT
DUR SCALE
DURATION
END DELAY
REPEAT #0
END DELAY
REPEAT
FUNCTION
CLEAR SEQ
FUNCTION
REPEAT
EVENT#
REPEAT
PREVIOUS SCREEN EVENT#
#1
SEQUENCE#
#2
PREVIOUS SCREEN
..
#98
#99
PREVIOUS SCREEN
WAVEFORMS
MORE
MX Series
START ø
GO TO VOLT
DUR SCALE
DURATION
END VOLT
END DELAY
FUNCTION
REPEAT
EVENT#
PREVIOUS SCREEN PREV. SCREEN
CLIP LEVEL
GROUP
MODE
SINE
SQUARE
CLIPPED
USER WAVE
..
..
USER WAVE
87
4.2.3 Overview of Menu 2 and 3
level 1
MENU 2 ADVANCE
MEAS.
APPLICATIONS
SETUP
REGISTERS
MORE
MENU 3 UTILITY
OUTPUT
IMPEDANCE
MEASUREMENT
CAL
1
level 2
HARMONICS/TRACE
ANALYSIS
FUNCTION
VIEW
DATA MODE
SCALE
TRIG MODE
TRIG SOURCE
TRIG PHASE
TRIG DELAY
START
APPLICATIONS SETUP 1
MIL-STD 704
OMNI OPTION
RTCA-DO160D
IEC 1000-4-11
APPLICATIONS SETUP 2
IEC 1000-4-13
WH METER
REGENERATE
SAVE REGISTER #
VIEW/EDIT REG #
RECALL REGISTER #
PREVIOUS SCREEN
UTILITY 1
GPIB/RS232 SETUP
VOLT/CURR CONTROL
PREVIOUS SCREEN
INITIAL SETUP
LIMIT SETUP
MORE
UTILITY 2
CONFIGURATION
LANETWORK SETUP
ELAPSED TIME
VIEWING ANGLE
PREVIOUS SCREEN
RESISTIVE
INDUCTIVE
SET MINIMUM
Series II only
VOLT FS
CURR FS
PREVIOUS SCREEN
level 3
STEADY STATE
MODE
TRANSIENTS
NORMAL STATE
PREVIOUS SCREEN ABNORMAL
IEC 1000-4-11 TESTS EMERGENCY
EMERGENCY
DIPS AND INTER.
ABNORMAL
ALL MIL704 TESTS
IEC 1000-4-13 TESTS VOLT VARIATIONS
PREVIOUS SCREEN
PREVIOUS SCREEN
WATT-HOUR METER
STATE
PREVIOUS SCREEN Series II SNK only
RUN
REGEN CONTROL
START
CLASS
STATE
ETIME
GROUP
UNDER VOLT
WATT HR
DWELL
OVER VOLT
POWER
LEVEL
dFREQ
PK CURR
FRANGE
DELAY
STEP
IHFREQ
RESONANT
CONFIG SETUP 1
NO. OUTPUT
ADVANCE
DO160
MIL704
CONFIG SETUP 2
IEC 4-11
IEC 4-13
CLOCK/LOCK
WH METER
CONFIG SETUP 31
MS704
ABD
LF
SYSTEM
CONFIG SETUP 4
MB
MANUAL
OPTn
LAN
SNK
VOLTAGE
CUR LIMIT
FREQ LO
FREQ HI
PHASE C
PREVIOUS SCREEN
VOLTAGE
CUR LIMIT
PREV. SCREEN
FREQ
PHASE
MORE
VOLT RANGE
VOLT MODE
OL MODE
OUTPUT RELAY
MORE
VOLT SENSE
WAVE GROUP
CLOCK MODE
NO. OUTPUT
VOLT ALC
PREVIOUS SCREEN
VOLT ALC
OL MODE
TRIP DELAY
VOLT SENSE
NO. OUTPUT
PREV. SCREEN
GPIB ADDRESS
RS232 BAUDRATE
RS232 DATA
RS232 PARITY
RS232 STOPBITS
PREVIOUS SCREEN
HH:MM:SS
TEMPERATURE
Series II only
Series I only
VOLT FS
VOLT 0
VOLT FS HT
VOLT FS 0
CURR FS
CURR 0
CURR FS HT
CURR 0 HT
CONFIGURATION SETUP 3 menu available on Series II models only.
MX Series
88
OUTPUT CAL
Series II only
VOLT FS
VOLT ZERO
PHASE OFST
IHARM FS
IMP. REAL FS
IMP. REACT FS
IMP. REAL MIN
IMP. REACT MIN
PREVIOUS SCREEN
PREVIOUS SCREEN
Series I only
VOLT FS
V HI-FREQ
VOLT ZERO
PHASE OFST
IMP. REAL FS
IMP. REACT FS
IMP. REAL MIN
IMP. REACT MIN
PREVIOUS SCREEN
4.2.4 PROGRAM Menu
Figure 4-8: PROGRAM Menu
The PROGRAM menu is shown in Figure 4-8. It can be reached in one of two ways:
1. by selecting the PROGRAM entry in the MENU screen and pressing the ENTER key
2. by pressing the PROG key in the FUNCTION keypad
The PROGRAM menu is used to change output parameters. The most commonly used
parameters are all located in PROGRAM 1. The PREVIOUS SCREEN entry, when selected, will
return the user to the most recently selected menu. This is normally the MENU screen unless
the PROGRAM menu was selected using the PROG key on the FUNCTION keypad. Less
frequently used parameters are located in PROGRAM 2, which can be reached from the
PROGRAM 1 screen using the MORE selection, or by pressing the PROGRAM key twice.
The following choices are available in the PROGRAM menus:
Entry
Description
PROGRAM 1
VOLTAGE
Programs the output voltage in Vrms while in AC mode or
absolute voltage when in DC mode. In DC mode, negative
values can be entered.
FREQ
Programs the output frequency when in AC mode. If the unit is
in DC mode, the value for FREQ will be set to DC and cannot
be changed until AC mode is selected. When in AC mode, the
frequency can be changed from 16 Hz to 500 Hz. Values
entered that fall outside this range will generate a -200 RANGE
ERROR and will not be accepted.
VOLT RANGE
Selects 150V, 300V or optional 400V range in AC mode and
200V or 400V range in DC mode. The actual range values may
be different depending on the configuration. The value of this
field can only be changed with the shuttle or the +/- key.
CURR LIMIT
Sets the current limit value for the current detection system.
When the load current value exceeds the set current limit, a
fault condition is generated. The actual response of the AC
Source to a current limit fault is determined by the protection
mode selected in the CONFIGURATION menu. (CC = Constant
Current, CV = Constant Voltage).
MX Series
89
PROGRAM 2
PHASE
Selects the phase angle between the external clock and the
output of the AC source. If the clock source is internal, this
parameter has no effect.
CLOCK MODE
Selects internal or external clock source. The MX Series
controller uses an open-air crystal time base with an accuracy
of 100 ppm. To improve output frequency stability and
accuracy, an external clock generator may be used.
VOLT MODE
The MX Series offers three output modes, AC, DC and AC+DC.
The VOLT MODE field can be used to toggle between these
three output modes. Both the Knob and the +/- key may be
used to toggle through these three selections. In DC mode, no
frequency selection is possible and all maximum current and
power ratings are divided by two.
DC OFFSET
When the AC+DC mode is selected, the VOLTAGE field in the
PROGRAM 1 screen is used to set the AC portion of the output
voltage. The DC OFFSET field in the PROGRAM 2 screen can
be used to set the DC offset level. Either the knob or the
decimal keypad may be used to set the DC offset level.
START ø
Selects the start phase angle for output changes made to either
voltage or frequency. This allows changing the output at a
specific phase angle. The output on key also uses this phase
angle setting to program the output voltage up to the set level
after the output relay is closed. The default value for this field is
RANDOM.
MX Series
90
4.2.5 MEASUREMENTS Screens
The MX Series uses a DSP based data acquisition system to provide extensive information
regarding the output of the Source. This data acquisition system digitizes the voltage and current
waveforms and calculates several parameters from this digitized data. The result of these
calculations is displayed in a series of measurement data screens. The actual digitized
waveforms can also be displayed by selecting the Harmonics/Trace Analysis screen. A total of
four measurement screens are used to display all this information (3Pi controller only).
Figure 4-9: MEASUREMENTS Screen, Single Phase and Three Phase Modes
The first three Measurement screens available on the MX Series are not menus in that no
changes can be made anywhere. Instead, these three screens provide load parameter readouts.
The fourth measurement screen provides access to the advanced measurements and does offer
several user accessible fields (Pi controller only). The measurement screens can be reached by
successively pressing the MEAS key, which will toggle to all four available screens.
In three-phase mode, measurements are available for each phase individually. To select the
desired phase, use the PHASE key to toggle through phase A, B, C, or ABC. The ABC mode
displays the data for all three phases simultaneously.
The following parameters are available in the first three measurement screens:
Entry
Description
MEASUREMENT 1
VOLTAGE
When in AC or AC+DC mode, this value is the true rms output
voltage measured at the voltage sense lines. In DC only mode,
the voltage is the DC voltage including polarity.
CURRENT
When in AC or AC+DC mode, this value is the true rms output
current drawn by the load. In DC only mode, the current is the
DC current including polarity
FREQ
When in AC or AC+DC mode, the output frequency is
measured at the sense lines. When in DC only mode, this value
always reads “DC”.
POWER
In both AC and DC mode, this value is the real rms. power
consumed by the load.
MEASUREMENT 2
VA POWER
MX Series
In AC or AC+DC mode, this value is the apparent rms. power
consumed by the load. In DC mode, this value is always the
same as the POWER readout.
91
PEAK CURR
This readout reflects the peak current value detected at the
output. To measure inrush current for a unit under test, open
the output relay and reset the peak current value using the
PEAK CURR RESET entry. Then program the output voltage
and frequency and turn on the output relay. The peak current
measurement will continuously track the maximum current
value detected until reset.
POWER FACTOR
This readout shows the power factor of the load.
CREST FACTOR
This readout displays the ratio between peak current and rms
current.
MEASUREMENT 3
[3Pi controller only]
VOLT THD
This readout displays the total voltage distortion for the selected
phase. The distortion calculation is based on the H2 through
H50 with the fundamental voltage (H1) in the denominator. Note
that other common definitions of THD use the RMS value of the
voltage as the denominator. This may result in different
readings between instruments depending on the
implementation chosen. The mode used by the power source is
selectable over the bus.
CURR THD
This readout displays the total current distortion for the selected
phase. The distortion calculation is based on the H2 through
H50 with the fundamental current (H1) in the denominator. Note
that other common definitions of THD use the RMS value of the
current as the denominator. This may result in different
readings between instruments depending on the
implementation chosen. The mode used by the power source is
selectable over the bus.
INST PK CURR
This readout reflects the instantaneous peak current value
detected at the output. This value is updated continuously and
does not require a reset operation like the PEAK CURR
readout. The instantaneous peak current does not use a track
and hold mechanism like the PEAK CURR measurement in the
MEASUREMENT 2 screen. Instead, it tracks the peak current
on a cycle-by-cycle basis. The INST PK CURR typically tracks
the rms current and the crest factor.
Update Program Functions from Measurement Screen
The Shuttle can be used to update program parameters such as voltage, frequency or current
from the measurement screen. This can be achieved with the following sequence:
1. Select the program 1 screen using the PROG key.
2. Use the up and down key to select the desired function to update. (Selects parameter that
will be changed by the shuttle once in the MEAS1 screen)
3. Select the measurement 1 screen by pressing the MEAS key.
4. The pointer symbol (X) points to the programmed parameter (V, F or CL) that will be
affected by turning the shuttle.
MX Series
92
HARMONICS/TRACE ANALYSIS Screen
[3Pi controller only]
The fourth measurement screen is dedicated to the advanced measurements available on the
MX Series with 3Pi controller only. This screen is not available on the P controllers. The
Harmonics/Trace Analysis measurement screen is a true menu screen offering several user
accessible fields. These fields are used to select the desired acquisition trigger and display
mode. The actual data is displayed whenever the ENTER key is pressed while the cursor is on
the VIEW or START field. The following fields are available on this menu:
Figure 4-10: HARMONICS/TRACE ANALYSIS Screen
Entry
Description
FUNCTION
Selects Voltage, Current or Both parameters for display.
VIEW
Available display modes are TABLE, BAR and TRACE.
MX Series
TABLE mode:
Displays the first 50 harmonics in a
tabular text format.
BAR mode:
Displays the first 50 harmonics in a
graphical bar chart display.
TRACE mode:
Displays the selected Function in a
time domain (waveform) graphical
display.
93
DATA MODE
Selects absolute or relative harmonics display for TABLE and
BAR view modes. In relative mode, all harmonics are shown in
a percentage of the fundamental, which is normalized at 100 %.
In absolute mode, the harmonic amplitudes are shown in
absolute volts or amperes.
This mode does not apply to the TRACE view display mode and
is ignored when this mode is selected.
SCALE
Sets the horizontal time axis for the TRACE view display mode.
The field range is:
Series I:
4 ms to 104 ms in single-phase mode (MX30-3Pi or
MX45-3Pi only) or 12 ms to 312 ms in three phase mode.
Series II: 4 ms to 42 ms in single-phase mode (MX30-3Pi or
MX45-3Pi only) or 12 ms to 128 ms in three phase mode.
This parameter is ignored when the TABLE or BAR view display
mode is selected.
TRIG MODE
This field sets the trigger mode for the acquisition. Available
options are SINGLE (single shot acquisition) or CONT
(continuous acquisition). In SINGLE shot mode, the acquisition
is triggered once each time the START field is selected and the
ENTER key is pressed. The selected trigger source is used to
determine the trigger point. Once the acquisition has been
triggered, the data are displayed and do not change until the
next acquisition is triggered. This mode is most appropriate for
single shot events such as start up currents.
In the CONT mode, acquisitions occur repeatedly and the data
is updated on screen after each trigger occurs. This provides a
continuous update of the data and is most appropriate for
repetitive signals.
TRIG SOURCE
The trigger source selects the event that will trigger a
measurement acquisition. Available options for this field are
IMM (immediate), PHASE A or SET VOLT. The IMM trigger
source causes the acquisition to trigger immediately when the
ENTER key is pressed on the START field. Essentially, this is
an asynchronous trigger event. The acquisition will always be
triggered in this mode and data is available immediately.
The PHASE A source will cause the acquisition to trigger on the
occurrence of a set phase angle for the voltage on phase A.
The trigger source is always phase A when in this mode,
regardless of the phase selection shown in the top right corner
of the display. When the acquisition is started, the acquisition
system waits for the specified phase angle to occur before
triggering the acquisition. This mode allows exact positioning of
the acquisition data window with respect to the voltage
waveform.
The SET VOLT mode causes the acquisition to trigger at the
specified voltage. This mode also programs the selected phase
or all three phases when the measurement is started from the
START field. As such, this trigger source selection also
programs the output voltage to the selected rms level.
TRIG PHASE / SET VOLT
MX Series
This field changes purpose, depending on the trigger source
selected immediately above it. If the trigger source equals IMM
94
or PHASE A, this field can be used to program the trigger
phase angle (TRIG PHASE). In IMM mode, the value of this
field is ignored.
If the trigger source is set to SET VOLT, this field can be used
to specify the rms voltage to program the output to and trigger
the measurement on. The voltage value set here should not
exceed the maximum voltage range selected or the rms
capability for the wave shape selected on the phase or phases
programmed.
TRIG DELAY
The trigger delay field allows the trigger point to be positioned
anywhere in the acquisition window. A negative value will
provide pre-trigger information on data leading up to the trigger
event. The pre-trigger delay cannot exceed the length of the
acquisition buffer. See paragraph 4.6.3.3 for details. A positive
trigger delay positions the data window after the trigger event.
Positive trigger delays can exceed the length of the acquisition
buffer in which case the trigger event itself will not be in the
buffer any more. The maximum value of the trigger delay is
1000 ms. The default trigger delay value is 0.0 ms, which puts
the trigger event at the beginning of the acquisition window.
START
The START field is used to start a new acquisition run. To start
an acquisition, place the cursor on the START field and press
the ENTER key. Once the ENTER key is pressed, the display
toggles to the data display mode selected in the VIEW field as
soon as the selected trigger event occurs. To return to the
HARMONICS/TRACE ANALYSIS menu, press the ENTER key
while in the data display mode.
To change display modes without triggering a new acquisition,
make the desired changes in the menu and move the cursor to
the VIEW field. Once on the VIEW field, press the ENTER key.
This will not trigger a new acquisition, which means the original
data is retained.
MX Series
95
4.2.6 TRANSIENTS Menu
Figure 4-11: TRANSIENTS Menu
The transient menu provides access to the transient list data. Available list length is:
Series I:
Both P and Pi controllers; 32 data points. This is represented by 32 transient
step numbers from 0 through 31.
Series II:
Both P and Pi controllers; 100 data points. This is represented by 100 transient
step numbers from 0 through 99.
From the Transient menu, the desired transient step type can be selected. Based on the user’s
choice, the relevant transient type sub menu will be shown. The START/EDIT SEQUENCE sub
menu allows the user to review and change any transient step or execute the transient list.
When executing a transient list, transient steps are executed in a ascending numerical order.
Steps that are not defined are skipped.
The following entries can be found in the TRANSIENTS menu:
Entry
Description
VOLT SURGE/SAG
Voltage surges and sags are temporary changes in amplitude.
The output voltage will change from its present value to a user
specified value for a specified duration. (Sag if the value is
lower, surge if the value is higher.) After this period has expired,
the output voltage returns to a user specified end value. This
value may or may not be the same as the value present prior to
the start of the sag or surge.
VOLT SWEEP/STEP
Voltage sweeps cause the output voltage to change from the
present value to a user specified end value at a specified rate of
change. A voltage step on the other hand is an instantaneous
change in output voltage. The new value will be held for the
duration period specified by the user. The final output voltage
value of a sweep and a step transient step should be different
than the value at the start of the transient step or no change in
output value will occur.
FREQ SWEEP/STEP
This transient type is similar to a voltage sweep/step except it
affects the frequency. Refer to the previous paragraph.
VOLT/FREQ SWEEP/STEP
This transient type combines the previous two types into a
single step. The effect is that of changing the output voltage
and frequency simultaneously.
Note: While this transient is programmed as a single transient
step, two list entries are required to store this information. As
such, every VOLT/FREQ SWEEP/STEP used will consume two
list entries at a time.
MX Series
96
START/VIEW SEQUENCE
This entry allows the user to switch to the transient execution
menu. This menu provides a list of all available transient list
steps and their sequence numbers. From this menu, transient
list execution can be started.
The same menu can be used to view or edit any available
transient list step or erase a step using the backspace key.
4.2.6.1 VOLT SURGE/SAG sub menu
Figure 4-12: VOLTAGE SURGE/SAG SETUP Screen
The Voltage surge and sag screen shown in Figure 4-12 can be reached from the transient
screen as follows:
1. Scroll to the VOLT SURGE/SAG entry using the up and down cursor keys.
2. Press the ENTER key to bring up the VOLT SURGE/SAG screen.
The VOLT SURGE/SAG screen has several data fields. All data fields that are blank to the right
of the equal sign must be filled or an error message will occur when trying to leave this screen.
The EVENT # is the last data field to be filled. Entering the event data field will cause the display
to return to the TRANSIENT screen where a new selection can be made.
The VOLT/SURGE/SAG screen has the following fields:
START ø
This field will show the start phase angle of the voltage transient
in degrees. Only one start phase angle per transient sequence
is allowed. The start phase angle must be in the first transient
event in the list. The start phase angle is not valid for DC
transients. If no start phase angle is required, this field can be
set to RANDOM by pressing the BACKSPACE (<-) key on the
decimal keypad.
GO TO VOLT
This field will set the voltage level during the transient duration
in volts
DUR SCALE
Duration scale default is time in seconds. Use the Shuttle knob
to select CYCLES if desired. Note that durations expressed in
cycles may cause rounding errors if the period of the selected
frequency setting is not an integer number of mss. Thus, for 50
Hz applications, no rounding errors occur but for 60 Hz, the
16.66̄ ms period will cause a rounding error when converted.
The Duration scale selection affects both the DURATION and
END DELAY parameters.
DURATION
Duration is the time the output voltage level will dwell at the GO
TO VOLT level. The DUR SCALE defines the time scale of this
parameter in CYCLES or SECONDS
END VOLT
This is the output voltage level at the end of the transient
EVENT and after a time specified by the DURATION
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END DELAY
This is the time delay the voltage level will stay at the END
VOLT level before it proceeds with the next transient event or
completes the transient.
FUNCTION
[3Pi controller only] This field can be used to select the wave
shape to be used during this step of the transient sequence.
Each step can use a different wave shape from the available
library of 50 user-defined waveforms or the three standard
waveforms. The output wave shape changes upon entry into
each step and remains in effect for the duration of the step. The
default wave shape is always the SINE (sine wave).
REPEAT
This is the number of times the SURGE/SAG transient event
will repeat before it will proceed to the next event or exit the
transient program. Note that the number of times the transient
event is generated is equal to the REPEAT + 1. Leave this
value at zero if only one execution of this event in the list is
required.
EVENT #
This must be the last item in the transient edit screen. All data
fields must be entered before inserting the EVENT #. The
EVENT # takes a value from 1 to 99. The EVENT # defines the
order of execution of the transient events in a multiple event
transient. It is a good practice to enter spaced EVENT #’s to
allow insertion of an EVENT later if needed. (For example,
space them by 5.) Entry of a sequence EVENT # number will
cause the display to return to the TRANSIENT screen.
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4.2.6.2 VOLTAGE SWEEP/STEP sub menu
Figure 4-13: VOLTAGE SWEEP/STEP SETUP Screen
The Voltage sweep and step screen shown in Figure 4-13 can be reached from the transient
screen as follows:
1. Scroll to the VOLT SWEEP/STEP entry using the up and down keys.
2. Press the ENTER key to bring up the VOLTAGE SWEEP/STEP screen.
The VOLTAGE SWEEP/STEP screen has several data fields. All data fields that are blank to the
right of the equal sign must be filled or an error message will occur when trying to leave this
screen. The EVENT # is the last data field to be filled. Entering the event data field will cause the
display to return to the TRANSIENT screen where a new selection can be made.
The VOLTAGE SWEEP/STEP screen has the following fields:
START
This field will show the start phase angle of the voltage transient
in degrees. Only one start phase angle per transient sequence
is allowed. The start phase angle must be in the first transient
event in the list. The start phase angle is not valid for DC
transient.
END VOLT
This is the output voltage level at the end of the transient event
in volts.
DUR SCALE
Duration scale default is time in seconds. Use the Shuttle knob
to select CYCLES if desired. Note that durations expressed in
cycles may cause rounding errors if the period of the selected
frequency setting is not an integer number of mss. Thus, for 50
Hz applications, no rounding errors occur but for 60 Hz, the
16.66̄ ms period will cause a rounding error when converted.
The Duration scale selection affects both the DURATION and
END DELAY parameters.
DURATION
Duration is the time it will take for the output voltage to reach
the END VOLT level. As such, “Duration” will define the slew
rate of the output voltage for the event. A duration of 0 seconds
will cause the output voltage to reach the end voltage
immediately. The DUR SCALE defines the time parameter
CYCLES or SECONDS
END DELAY
This is the time delay the voltage level will stay at END VOLT
before it proceeds with the next transient event or completes
the transient.
FUNCTION
[3Pi controller only] This field can be used to select the wave
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REPEAT
This is the number of times the VOLTAGE SWEEP/STEP
transient event will repeat before it will proceed to the next
event or exit the transient program. Note that the number of
times the transient event is generated is equal to the REPEAT +
1. Leave this value at zero if only one execution of this event in
the list is required.
EVENT #
EVENT # takes a value from 1 to 99. The EVENT # defines the
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4.2.6.3 FREQUENCY SWEEP/STEP sub menu
Figure 4-14: FREQUENCY SWEEP/STEP SETUP Screen
The Voltage sweep and step screen shown in Figure 4-14 can be reached from the transient
screen as follows:
1. Scroll to the FREQ SWEEP/STEP entry using the up and down cursor keys.
2. Press the ENTER key to bring up the FREQ SWEEP/STEP screen.
The FREQ SWEEP/STEP screen has several data fields. All data fields that are blank to the
right of the equal sign must be filled or an error message will occur when trying to leave this
The FREQ SWEEP/STEP screen has the following fields:
DURATION
Duration is amount of the time the output frequency will take to
reach the END FREQ level. Duration will define the slew rate of
the output frequency for the event. A duration of 0 seconds will
cause the output frequency to reach the end frequency
immediately.
END FREQ
This is the output frequency at the end of the transient event in
Hz.
END DELAY
This is the time delay the frequency will stay at END FREQ
before it proceeds with the next transient event or completes
the transient.
FUNCTION
[3Pi Controller only] This field can be used to select the wave
REPEAT
This is the number of times the FREQUENCY SWEEP/STEP
transient will repeat before it will proceed to the next event or
exit the transient. The number of times the transient event is
generated is equal to the REPEAT + 1. Leave this value at zero
if only one execution of this event in the list is required.
EVENT #
EVENT # takes value from 1 to 99. The EVENT # defines the
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4.2.6.4 VOLTAGE/FREQUENCY SWEEP/STEP sub menu
Figure 4-15 VOLTAGE/FREQUENCY SWEEP/STEP SETUP Screen
The Volt/freq sweep/step screen shown in Figure 4-15 can be reached from the transient screen
as follows:
1. Scroll to the VOLT/FREQ SWEEP/STEP entry using the up and down cursor keys.
2. Press the ENTER key to bring up the VOLT/FREQ SWEEP/STEP screen.
The VOLT/FREQ SWEEP/STEP screen has several data fields. All data fields that are blank to
the right of the equal sign must be filled or an error message will occur when trying to leave this
The VOLT/FREQ SWEEP/STEP screen has the following fields:
DURATION
Duration is the amount of time the output voltage and frequency
will take to reach the END FREQ and END VOLT levels.
Duration will define the slew rate of the output voltage and
frequency for the event. A duration of 0 seconds will cause the
output voltage and frequency to reach their end value
immediately.
END FREQ
This is the output frequency at the end of the transient event in
Hz.
END VOLT
This is the output voltage at the end of the transient event in
volts.
END DELAY
This is the time delay the output frequency and voltage will stay
at END FREQ and END VOLT before proceeding with the next
transient event or completing the transient.
FUNCTION
[3Pi Controller only] This field can be used to select the wave
REPEAT
This is the number of times the VOLTAGE/FREQUENCY
SWEEP/STEP transient will repeat before it will proceed to the
next event or exit the transient. The number of times the
transient event is generated is equal to the REPEAT + 1. Leave
this value at zero if only one execution of this event in the list is
required.
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EVENT #
EVENT # takes value from 1 to 99. The EVENT # defines the
4.2.6.5 START/VIEW TRANSIENT SEQUENCE sub menu
Figure 4-16:START/VIEW TRANSIENT SEQUENCE Screen
The START/VIEW TRANSIENT SEQUENCE screen is used to control transient execution. It
also provides an overview of available transient list events. This list appears in the order they
were assigned event numbers. Editing an existing event can be accomplished from this screen
by positioning the cursor on the event to be edited and pressing the ENTER key. This method
can also be used to review the parameters of a previously entered event.
The START/VIEW TRANSIENT SEQUENCE screen has the following fields:
START / ABORT
The START field is used to start a transient execution. When
the cursor is positioned on the START field and the ENTER key
is pressed, transient execution starts. The output relay must be
closed or an error message will appear and the transient will not
start.
Once a transient is in progress, this field changes to ABORT
and can be used to abort a transient in progress. If the transient
completes execution, the field reverts back to START.
PAUSE / RESUME
The PAUSE field may be used to suspend execution of a
transient list in progress. If the cursor is on the PAUSE field and
the ENTER key is pressed, the transient is suspended and this
field changes to RESUME. Pressing the ENTER key again will
cause the transient list to resume execution from the point
where it was suspended.
REPEAT #
This field determines the number of times a transient list is
repeated. The default value is zero, which means the
programmed list runs only once. The range for this field is from
0 through 99999. This repeat function should not be confused
with the REPEAT function available for individual events. The
event specific repeat value will cause only that event to be
repeated, not the entire list.
CLEAR SEQ
Moving the cursor to this field and pressing the ENTER key will
cause the entire programmed transient list to be erased. Be
careful not to press ENTER accidentally while on this field as
you will loose the programmed transient list. Note that a list may
be stored as part of the front panel setup in the nonvolatile
memory registers.
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4.2.7 WAVEFORMS Menu
[3Pi Controller only]
Figure 4-17: WAVEFORMS Menu
The WAVEFORMS menu is available on the 3Pi controller only. If your unit has a P controller,
pressing the WAVE key on the front panel function keypad has no effect. The WAVEFORMS
menu allows selection of the wave shape for each phase individually or all phases at once. In
three-phase mode, the mode is determined by the phase coupling.
The selected phase is shown in the top right corner of the display (øA, øB or øC). The selected
wave shape will be applied to that phase. If all phases are selected (phase coupling), the
selected waveform will apply to all three phases.
If single phase is selected on a 45MX-3Pi model, the phase coupling is always set to phase A,
so pressing the PHASE button has no effect.
The following fields are available in the WAVEFORMS menu:
CLIP LEVEL
This parameter determines the amount of total harmonic
distortion of the built-in CLIPPED sine wave waveform. The
range is 0 % through 20 % THD.
Note that changing the distortion level of the CLIPPED sine
wave while the CLIPPED sine wave is used on the output of
one or more phases, forces the output of the AC Source to be
dropped momentarily. To avoid this, make sure none of the
phases is using the CLIPPED sine wave function when
changing the clip level.
GROUP
The group field displays the currently selected waveform group.
There are four groups of 50 user-defined waveforms each for a
total of 200 waveforms. Only one group can be active at a time
however. This field only displays the selected waveform group.
It cannot be used to change the actual group selected. Group
selection must occur at power up and is done from the INITIAL
SETUP 3 screen. See section 4.2.11.3 for details.
MODE
The mode field determines the operation mode of the
WAVEFORMS display screen. Available options for this field
are:
PROG:
This mode is used to change the programmed
wave shape function on the selected phase. This is also the
default mode of operation.
VIEW (T):
This mode can be used to display any of the
available user defined waveforms in a time domain display.
Previewing a waveform can be useful if you are unsure about
the nature of the waveform that was stored.
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VIEW (F):
This mode can be used to display any of the
available user defined waveforms in a frequency domain
display. Waveform data is shown by harmonic amplitude and
phase relative to the fundamental frequency. Previewing a
waveform can be useful if you are unsure about the nature of
the waveform that was stored.
SINE
The SINE is a standard waveform that is always available. It
does not consume any of the user defined waveform registers
and is always displayed in the waveform list. A right arrow
indicates the waveform is presently selected for the phase. If
the cursor is moved to this field, the ENTER key will execute
the selected MODE. If the mode is set to PROG, pressing
ENTER while the cursor is on the SINE entry will select the sine
wave for the phase shown in the top right corner of the display.
Note that the VIEW modes are not available for any of the three
standard waveforms.
SQUARE
The SQUARE is a standard waveform that is always available.
It does not consume any of the user defined waveform registers
ENTER while the cursor is on the SQUARE entry will select the
square wave for the phase shown in the top right corner of the
display.
standard waveforms.
CLIPPED
The CLIPPED is a standard waveform that is always available.
It does not consume any of the user defined waveform registers
ENTER while the cursor is on the CLIPPED entry will select the
clipped sine wave for the phase shown in the top right corner of
the display. The CLIP LEVEL field determines the amount of
clipping.
standard waveforms.
USER DEFINED
MX Series
A list of user defined waveforms appears immediately below the
three standard waveforms. If no user-defined waveforms were
downloaded to the power source, this list will be blank. User
defined waveforms can be given a symbolic name of up to
twelve characters. The use of any of the three standard
waveform names (SINE, SQUARE and CLIPPED) should be
avoided, as the MX controller will reject it.
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A right arrow indicates the waveform is presently selected for
the phase. If the cursor is moved to this field, the ENTER key
will execute the selected MODE. If the mode is set to PROG,
pressing ENTER while the cursor is on the user defined entry
will select the custom waveform for the phase shown in the top
right corner of the display.
If the MODE is set to either VIEW option, the waveform data
under the cursor will be displayed when the ENTER key is
pressed. Press the ENTER key again to return to the
WAVEFORMS menu.
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4.2.8 ADVANCE MEAS. Menu [3Pi Controller only]
This entry in the MENU 2 screen displays the HARMONICS/TRACE ANALYSIS screen which is
covered in section 4.6. This field can be used in lieu of the MEAS key to directly bring up the
advanced measurements screens.
4.2.9 APPLICATIONS Menus
Figure 4-18: APPLICATIONS Menus
The APPLICATIONS menu provides access to the optional application specific pre-programmed
test sequences. Since these test sequences are optional, this menu may have no choices if
none of the options are installed. The following entries may be found in the APPLICATIONS
menu:
Entry
Description
MIL-STD 704
Test sequence for MIL standard 704 AC and DC tests.
OMNI OPTION
This entry selects the OMNI control menu. The OMNI option
provides a lumped reference impedance for use in IEC 610003-3 or IEC 61000-3-11 Flicker test applications. If the OMNI
option is installed, this screen allows the impedance to be
ENGAGED or BYPASSED.
RTCA/DO-160
Test sequence for RTCA DO160 commercial aviation AC and
DC tests.
IEC-1000-4-11
Test sequences for IEC 61000-4-11 Voltage Dips and
Variations test standard.
IEC-1000-4-13
Test sequence for IEC 61000-4-13 Harmonics and Inter
harmonics test standard.
WH METER
Watt Hour meter measurement option. Tracks energy usage
over a period of time and calculates Watt Hours used.
REGENERATE
The REGENERATE entry is enabled only if the –SNK option is
installed. It provides access to the setting for driving
regenerative load.
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4.2.10 SETUP REGISTERS Menu
Figure 4-19: SETUP REGISTERS Menu
The SETUP REGISTERS menu allows the user to store and recall complete instrument setups,
including transient program lists. A total of 8 non-volatile setup registers is available, numbered
sequentially from 0 through 7. (For Series II, number of registers is 16).
The following entries can be found in the SETUP REGISTERS menu:
Entry
Description
SAVE REGISTER
Save present instrument setup to a register number selected by
the user. The numeric data entry keypad should be used to
enter a number between 0 and 7 (15). Once the ENTER key is
pressed, all settings are saved. A message will appear at the
bottom of the screen to confirm the save operation.
RECALL REGISTER
Recall instrument setup from a register number selected by the
user. The numeric data entry keypad should be used to enter a
number between 0 and 7 (15). Once the ENTER key is
pressed, all settings are recalled. A message will appear at the
bottom of the screen to confirm the recall operation.
VIEW/EDIT REGISTER
The View/Edit entry can be used to display the contents of a
setup register before it is recalled. After the user enters a
register number to view or edit and presses the ENTER key, the
PROGRAM screen will appear. All parameters that will be
changed by recalling the register will be blinking. If ENTER is
pressed again, the register will be recalled and the new values
take effect. To edit the register content, change all parameters
that need to be changed. Pressing ENTER will save the new
values and make them active.
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4.2.11 UTILITY Menus
Figure 4-20: UTILITY Menus
The UTILITY menus provide access to less frequently used setup items. There is no connection
between the various entries in the UTILITY menu other than there is no other logical place to put
them. The following entries can be found in the UTILITY menu:
Entry
Description
UTILITY 1
GPIB/RS232 SETUP
This entry provides access to the setup parameters for either
the IEEE-488, RS232, USB or LAN interface. All parameters
are saved in non-volatile memory so there is rarely a need to
change these values.
VOLT/CURR CONTROL
The voltage and current control menu can be used to select the
current limit method, the voltage sense source, and the number
of output phases. (Phase mode selection available on MX303Pi or MX45-3Pi model.)
The standard available voltage range pairs are 150 Vac and
300 Vac in AC mode or 200 Vdc and 400 Vdc in DC mode.
The two current limit choices are Constant Voltage and
Constant Current. Constant Voltage mode will maintain the set
voltage at the output until the load current exceeds the current
limit setting at which time the voltage will be dropped to zero.
This effectively shuts off the AC source output in case of an
overload condition. This mode has user programmable trip
delay, which is located in the same menu.
Constant Current mode will maintain the load current at the
maximum level set by the current limit value, even if the
maximum power level is exceeded. This is done by reducing
the voltage as needed. As such, the voltage will be reduced
from the set level down to zero depending on the load
requirement. This mode is useful for starting up motor or
capacitor loads that may require a high inrush current. This
mode also has a user programmable trip delay.
Voltage sensing for regulation and measurement can be
selected for internal or external. External voltage sensing can
compensate for voltage drops caused by load cable impedance.
To achieve the best output regulation select external sense and
connect the voltage sense wires at the load.
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INITIAL SETUP
The initial setup menu can be used to determine the AC source
settings at power up. CAUTION: The initial setup can be used
to power up the AC source with the output on and a high
voltage present at the output. For normal situations, this is not
recommended due to the potential danger to operators. It is
recommended that the initial voltage be set low and/or the
output relay be programmed to OFF for most situations.
LIMIT SETUP
The Limit menu shows the frequency, voltage and current limit
capabilities of the AC source. Any attempt to program the
output beyond these limits will result in a “-222 Data Out of
Range error”. Note that these limits are hardware determined
and cannot be changed by the user. They are shown for
reference only.
UTILITY 2
CONFIGURATION
The Configuration menu shows the installed options. This
screen is for reference only and typically, no fields can be
changed by the user.
LANETWORK SETUP
Displays or sets LAN interface settings. If the LAN option is
present, this screen may be used to view or change LAN
parameters. The MAC address is fixed and cannot be changed.
IP and Gateway addresses are normally assigned by the
network DCHP server. Changes to the other fields can be made
by pressing the SET button first. The indicator in the top right
hand of the screen will change from “NC” to “SET”. Note that
any setting changes made won’t take effect till after the unit has
been powered down and back up.
To set the LAN interface to AUTO IP mode, set the IP and
Gateway address to all zeros. This will cause the IP to be
requested from the network the next time power is cycled. To
manually set the IP and Gateway address, enter the address
from the keypad.
The Port address is normally set to 5025. The number of host
bits is a function of the network address range.
To rest the LAN to its default configuration, select the MAC
Address and press the SET key followed by ENTER key.
Confirm with the ENTER key.
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ELAPSED TIME The elapsed time screen, when selected from
the UTILITY menu, will appear for about 3 seconds. The
elapsed time shown is the cumulative amount of time the power
source has been on from its initial build. This value is read only
and cannot be changed by the user.
The same screen also displays the internal AC source ambient
temperature in degrees C.
VIEWING ANGLE
MX Series
The viewing angle can be used to change the contrast ratio of
the LCD display. The range of the viewing angle parameter is
from -10 to +10. Setting the right viewing angle is matter of
personal taste. Set this parameter to a value that is most
comfortable for the user. To save a new viewing angle setting,
change the number to the desired value using the knob or the
keypad and press the ENTER key. The new value will blink. To
save it permanently, press the SET key.
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4.2.11.1 GPIB/RS232 (incl. USB/LAN) SETUP menu
Figure 4-21: GPIB/RS232 SETUP Menu
The GPIB/RS232 SETUP menu may be used to change the interface parameter settings for
both the IEEE-488 interface and the RS232, USB or LAN interface. The number of interfaces
available will depend on the specific model and options as well as the time of manufacture.
Older MX models do not offer USB or LAN interfaces. Newer models can be equipped with as
many as 4 different interfaces although only one can be used at the same time.
Refer to the MX Series Programming Manual P/N 7003-961 distributed in Adobe PDF format on
the same CD ROM as this user manual for more details on using the RS232, USB or LAN
interface.
The following parameters can be set from this menu:
GPIB ADDRESS
Sets the IEEE-488 address used by the AC source. The
address value can be set from 0 through 31. Address 0 is often
reserved for the IEEE-488 controller. The factory setting is
address 1. Once changed, the IEEE-488 address is retained in
nonvolatile memory.
RS232 BAUDRATE
This field can be used to set the RS232 baud rate to either
9600, 19,200, 38,400, 57600 or 115,200 baud. The baud rate
set on the AC source must match the one programmed for the
communications port of the controller. Baud rates higher than
115200 are provided for the USB and LAN interface modes
only. The same setting is used for USB and LAN modes. For
use with either USB or LAN, the baud rate in this screen must
be set to 460800. See UTILITY 2 screen for other LAN setup
parameters.
RS232 DATA
This field is used to set the number of data bits to either 7 or 8.
Factory setting is 8 bits. This value must match the number of
data bits set on the communications port of the controller. For
USB or LAN use, always use factory settings.
RS232 PARITY
This field is used to set the parity. Available options are Even
(E), Odd (O) or no parity (N). Factory setting is No parity. This
value must match the parity set on the communications port of
the controller. For USB or LAN use, always use factory settings.
RS232 STPBITS
This field is used to set the number of stop bits used on the
serial port. Available options are 1 or 2 bits. Factory setting is 1
stop bit. This value must match the parity set on the
communications port of the controller. For USB or LAN use,
always use factory settings.
The number of start bits is always fixed to 1 bit.
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4.2.11.2 VOLTAGE/CURRENT CONTROL SETUP menu
Figure 4-22: VOLTAGE/CURRENT CONTROL SETUP Menu
The VOLTAGE/CURRENT CONTROL SETUP menu may be used to set output voltage and
current control parameters. These parameters are not frequently changed in the normal
operation of the AC source and are thus located on the UTILITY rather than the PROGRAM
menu.
The following options are available in this menu:
ALC MODE
Note:
Automatic Level Control of programmed output voltage. This
mode will use the internal voltage measurements to adjust the
output voltage continuously as needed. This effectively
increases the output accuracy and regulation beyond what is
possible with ALC off.
The Automatic Voltage Level Control (ALC) mode is mutually exclusive with the
Programmable Impedance function of the MX30-3Pi or MX45-3Pi. One must be
turned off the enable the other.
OL MODE
This field is used to select constant current (CC) or constant
voltage (CV) mode. The constant current mode will limit the
maximum amount of current drawn by the load to the set value.
The voltage will be reduced as needed after the trip delay time
to maintain the level of programmed current.
The constant voltage mode will maintain the set voltage as long
as the current drawn by the load does not exceed the current
limit programmed. If the current limit is exceeded, the output will
be shut off after the trip delay time.
TRIP DELAY
The trip delay field may be used to set the amount of time to
hold off the current limit trip point. The minimum amount of time
is 100 ms or 0.1 sec. The maximum amount of time is 5.00
sec.
VOLT SENSE
This field selects the internal or external sense line inputs.
Internal sense does not require the external sense lines to be
connected as sensing occurs at the output relay of the AC
source. For best results, connect the external sense lines and
select the EXT sense mode in this field. This will compensate
for voltage drop in the cables to the load. The measurements
are also taken at the sense points, so the external sense mode
should be used for best measurement results.
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NO. OUTPUT
MX Series
This field is only accessible on the MX30-3Pi or MX45-3Pi.
(Phase mode). It allows the number of output phases to be
toggled between one and three. In single-phase mode, all
power is routed a single output terminal block TB1B (A and
Neutral). In three-phase mode, power for phase A, B and C is
available on terminal block TB1A and the neutral connection is
still on TB1B but the A output on TB1B is not connected.
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4.2.11.3 INITIAL SETUP menu
Figure 4-23: INITIAL SETUP Menus
Any time the power source is powered up, the output will reflect the values stored as the INITIAL
setup values. This allows the unit to be powered up in a known state at all times. The INITIAL
values can be set in the INITIAL SETUP menus.
The initial setup can be used to power up the power source with the output on and a high
voltage present at the output. For normal situations, this is not recommended due to the
potential danger to the operator. It is recommended that the initial voltage be set low and/or the
output relay be programmed to OFF for most situations.
The following fields are provided in the INITIAL SETUP menus:
Entry
Description
INITIAL SETUP 1
VOLTAGE
Sets the power-on AC voltage for AC and AC+DC modes or the
DC voltage for DC mode.
CURR LIMIT
Sets the power-on current limit value.
FREQ
Sets the power-on frequency value.
PHASE
Sets the power-on frequency for phase A with respect to an
external sync signal. If the internal oscillator is used (default)
this setting has no effect.
INITIAL SETUP 2
VOLT RANGE
Sets the power-on voltage range value.
VOLT MODE
Sets the power-on voltage mode. Available settings are AC
mode, DC mode or AC+DC mode.
OL MODE
Sets the power-on overload mode. Available settings are
Constant Current (CC) or Constant Voltage (CV) mode.
OUTPUT RELAY
Sets the power-on state of the output relay. Available settings
are ON or OFF.
INITIAL SETUP 3
VOLT SENSE
MX Series
Sets the power-on state of the voltage sense mode. Available
settings are Internal (INT) or External (EXT).
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WAVE GROUP
[3Pi Controller only] Sets the user defined waveform group that
will be loaded at power on. Available groups are 0, 1, 2 and 3.
Each group can contain up to 50 user-defined waveforms. A
waveform group can only be loaded at power up. To change
groups, you must change this field to the desired new group
and cycle the power to the AC source or issue a *RST
command over one bus.
CLOCK MODE
Sets the clock source used at power up. Available settings are
Stand Alone (STAND), MASTER (-LKM clock and lock master),
and AUX (-LKS clock and lock auxiliary).
NO. OUTPUT
[MX30-3Pi or MX45-3Pi model only] Sets the phase mode at
power up. Available options are single-phase mode (ONE),
three-phase mode (THREE) or last used phase mode (LAST). If
the phase mode option is not installed, this field is fixed to ONE
or THREE.
VOLT ALC
Determines ALC mode at power on. The ALC mode adjusts the
output voltage based on internal voltage measurement system
and provides enhanced output regulation and accuracy.
Available settings are ON, OFF or REG (Series II only).
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4.2.11.4 LIMIT SETUP screen
Figure 4-24: LIMIT SETUP Menu
The limit setup screen is not a menu but only serves to inform the user of the hardware
capabilities of the AC source. The cursor can be moved to any of the fields in this screen but
none of these fields can be changed. The following information is provided on this screen:
Entry
Description
VOLTAGE
Maximum AC rms or DC voltage available in the high voltage
range.
CUR LIMIT
Maximum AC rms current limit available in the low voltage
range.
FREQ LO
Lowest possible fundamental frequency that can be
programmed.
FREQ HI
Highest possible fundamental frequency that can be
programmed.
PHASE C
Phase angle of phase C with respect to phase A in three phase
mode. If the AC source is a single phase model, this field will
shown 0°. If the AC source is a split phase model, this field will
shown 180°.
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4.2.11.5 CONFIGURATION SETUP screens
Figure 4-25: CONFIGURATION SETUP Menus
The configuration setup screens are not menus but only serve to inform the user of the software
options installed in the AC source. The cursor can be moved to any of the fields in this screen
but none of these fields can be changed. The following information is provided on this screen:
Entry
Description
CONFIGURATION SETUP 1
NO. OUTPUT
Displays7 the phase mode option. SELECT indicates the phase
mode option is installed and the user can select between single
and three phase modes of operation.
FIXED indicates the phase mode option is not installed and only
single phase or three phase mode of operation is possible.
ADVANCE
[Pi Controllers only] This field indicates the presence of
advanced capabilities for waveform generation and
measurement analysis are present.
DO160
Indicates the presence of the RTCA DO160 test option. If this
option is installed, this field will show ON. If this option is not
installed, this field will show N/A (not available).
MIL704
Indicates the presence of the MIL/STD-704 Revision D and E
test option. If this option is installed, this field will show ON. If
this option is not installed, this field will show N/A (not
available).
IEC 4-11
Indicates the presence of the IEC 1000-4-11 test option. If this
IEC 4-13
Indicates the presence of the IEC 1000-4-13 test option. If this
CLOCK/LOCK
Indicates the presence of the -LKS clock and lock auxiliary
option. For units without -LKS, this field is set to N/A. For units
with the -LKS option installed, this field is set to ON. Note that
master unit (with -LKM) also has this field set to N/A.
WH METER
Indicates the presence of the Watt Hour Meter option.
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118
SYSTEM
Shown here on Series I models only. See CONFIGURATION
SETUP 3 screen below.
(Series II models only)
MS704
Indicates the presence of the MIL/STD-704 Revision A through
F test option. If this option is installed, this field will show ON. If
this option is not installed, this field will show N/A (not
available). This field is available on Series II MX systems only.
ABD
Indicates the presence of the ABD0100.1.8 test option. If this
installed, this field will show N/A (not available). This field is
available on Series II MX systems only.
LF
Indicates the presence of the Low Frequency limit option. If this
option is set, the maximum frequency that can be programmed
is 500 Hz. This field is available on Series II MX systems only.
SYSTEM
This field sets the controller for the correct MX system
configuration. Available settings are:
MX30
MX30 Single Unit
MX45
MX45 Single Unit
MX60
MX60 system Master
MX90
MX90 system Master
MX135
MX135 System Master
MX180
MX180 system Master
MX225
MX225 system Master
MX270
MX270 System Master
AUX
Auxiliary System.
If this field is set incorrectly, the current limit scaling and current
measurement will be off by a factor of three. Changes made to
the SYSTEM field will not take effect until AFTER power on the
MX system is cycled. (Off, the back on).
Note: MX systems with Firmware rev. less than 4.0 do not
support MX60 configuration and uses MX45 setting for MX30.
MB
Indicates the presence of the Multi-box option. If this option is
set, the SYSTEM field (above) can be changed to
accommodate reconfiguration of the MX system. If this option is
not set, the SYSTEM configuration is fixed and cannot be
changed by the user. This field is available on Series II MX
systems only.
NOTE: If the MB option is enabled, great care MUST be taken to set the correct SYSTEM
setting for the configured hardware. Failing do so will result in incorrect operation
of the MX system and could even result in damage of MX or the equipment under
test.
NOTE: Options –A350, AMD24 and –B787 are only visible using the *OPT? Bus command and do
not have a visible field in the configuration screen for firmware revisions lower than 4.60.
For FW revision of 4.60 or higher, see CONFIGURATION SETUP 4 screen.
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119
(Series II models with FW 4.60 or higher only)
Note that the fourth configuration screen is only available on MX models with firmware revision
4.60 or higher. For units with older models, refer to the CONFIGURATION SETUP 3 screen.
MB
This entry was moved from CONFIGURATION SETUP 3 to
CONFIGURATION SETUP 4. Its purpose remains the same.
For details, see CONFIGURATION SETUP 3 manual section
on previous page.
MANUAL
This field does not apply to MX products and is always set to
N/A.
OPT0, OPT1, OPT2
This field indicates the presence of the following three options:
OPT0 = A350 Avionics option (-A350)
OPT1 = AMD24 Avionics option (-AMD)
OPT2 = B787 Avionics option (-B787)
The scroll through the three available OPTn fields, use the
shuttle. ON indicates the option is present, N/A indicates the
option is not installed.
LAN
This field indicates the presence of the LAN Ethernet interface
option. ON indicates the option is present, N/A indicates the
option is not installed.
SNK
This field indicates the presence of the Current Sink
regenerative mode option. ON indicates the option is present,
N/A indicates the option is not installed.
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4.2.12 OUTPUT IMPEDANCE Menu
[MX30-3Pi or MX45-3Pi Model in 3 phase mode only]
Figure 4-26: OUTPUT IMPEDANCE Menu
The MX30-3Pi and MX45-3Pi offers programmable output impedance in three-phase mode of
operation. This allows the user to simulate line impedance conditions by programming resistive
and inductive elements of the AC source’s output impedance.
Note:
No programmable impedance function is available in single phase mode or on MX
system configurations other than the MX35-3Pi.
The OUTPUT IMPEDANCE menu can be accessed from MENU 3. The following fields are
available in this menu:
Entry
Description
RESISTIVE
Sets the resistive component of the output impedance.
(The lower limits for the resistive and inductive components
may vary on different AC source models and are set as part of
the source calibration.)
INDUCTIVE
Sets the inductive component of the output impedance.
(The lower limits for the resistive and inductive components
may vary on different AC source models and are set as part of
the source calibration.)
SET MINIMUM
Note:
MX Series
Selecting this field and pressing the ENTER key sets both
impedance components to their minimum values. This
effectively turns the programmable impedance function off.
The Programmable Impedance function of the MX30-3Pi or MX45-3Pi is mutually
exclusive with the Automatic Voltage Level Control (ALC) mode of operation. One
must be turned off the enable the other.
121
4.2.13 MEASUREMENT CAL FACTORS Menu
Figure 4-27: MEASUREMENT CAL FACTORS Menu (Series I only)
Figure 4-28: MEASUREMENT CAL FACTORS Menu (Series II only)
The MEASUREMENT CAL FACTORS menu provides access to the measurement calibration
parameters. The parameters apply to the selected mode of operation (AC or DC mode). For
three phase configurations, the PHASE keys toggle between the three calibration screens for
each phase. These parameters are password protected and can only be changed after the
calibration password has been entered. Refer to the calibration section in this manual for details
on performing a calibration.
Note that Series II MX models only have two measurement calibration factors. Series I models
require additional cal factors as shown. The following calibration factors are available from this
menu:
Entry
Description
VOLT FS
Full scale voltage measurement calibration factor.
VOLT 0
Zero offset voltage measurement calibration factor. (Series I
only)
VOLT FS HT
Temperature compensated full-scale voltage measurement
calibration factor. (Series I only)
VOLT 0 HT
Temperature compensated zero offset voltage measurement
CURR FS
Full scale current measurement calibration factor.
CURR 0
Zero offset current measurement calibration factor. (Series I
only)
CURR FS HT
Temperature compensated full-scale current measurement
CURR 0 HT
Temperature compensated zero offset current measurement
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4.2.14 OUTPUT CAL FACTORS Menu
Figure 4-29: OUTPUT CAL FACTORS Menu (Series I only)
Figure 4-30: OUTPUT CAL FACTORS Menu (Series II only)
The OUTPUT CAL FACTORS menu provides access to the output calibration parameters.
These parameters are password protected and can only be changed after the calibration
password has been entered. For three phase configurations, the PHASE keys toggle between
the three calibration screens for each phase. Refer to the calibration section in this manual for
details on performing a calibration.
The following calibration factors are available from this menu:
Entry
Description
VOLT FS
Full scale voltage output calibration factor.
V HI-FREQ
High frequency full-scale voltage output calibration factor.
(Series I models only.)
VOLT ZERO
Zero offset voltage calibration factor.
PHASE OFST
Phase offset calibration factor. Compensates for phase shift
caused by AC amplifier.
IHARM FS
Option –413 Inter harmonic calibration coefficient. (Series II
models only.)
IMP. REAL FS
Full scale resistive output impedance calibration factor.
IMP. REACT FS
Full scale inductive output impedance calibration factor.
IMP. REAL MIN
Minimum resistive AC source output impedance. The AC
source has an output impedance greater than zero. This value
determines the minimum resistive component of the AC source
output impedance.
IMP. REACT MIN
Minimum reactive AC source output impedance. The AC source
has output impedance greater than zero. This value determines
the minimum inductive component of the AC source output
impedance.
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4.3 Output Programming
4.3.1 Set the Output
Output parameters are all set from the PROGRAM screen.
1. Use the MENU key and select the PROGRAM entry.
2. Press the ENTER key to bring up the PROGRAM menu.
or
2. Use the PROG key to directly bring up the PROGRAM menu.
There are two methods for programming output parameters:
IMMEDIATE mode
SET mode
4.3.2 Slewing Output Values with the Knob in IMMEDIATE Mode
The default mode of operation is an immediate mode in which changes to output parameters
made with the knob or the entry keypad are immediately reflected at the output.
To change the output voltage:
Counter
Clock
wise
DECR
Clock
wise
INCR
1. Place the cursor on the VOLTAGE entry
2. Rotate the knob clockwise to increase the value, counterclockwise to decrease the value
These changes take effect immediately.
To change the output frequency:
Counter
Clock
wise
DECR
Clock
wise
INCR
1. Place the cursor on the FREQ entry
These changes take effect immediately.
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4.3.3 Change Output Values with the Knob in SET Mode
The SET mode of operation is a mode in which changes to output parameters made with the
knob or the entry keypad do not affect the output until the ENTER key is pressed. The AC
source is put in this SET mode by pressing the SET key.
To change the output voltage:
Counter
Clock
wise
DECR
Clock
wise
INCR
1. Press the SET key
2. Place the cursor on the VOLTAGE entry
4. The VOLTAGE field will be blinking to indicate a change in settings but the output remains
unchanged.
5. Place the cursor on the FREQ entry
7. The FREQ field will be blinking to indicate a change in settings but the output remains
unchanged.
8. Press the ENTER key.
Both new voltage and frequency output values are now present at the output. The unit has
returned to immediate mode of operation until the SET key is pressed again.
4.3.4 Change Output Values with the shuttle knob from the MEASUREMENT 1 screen
Basic output settings such as voltage and frequency can be changed from the MEAS 1 screen
by using the following procedure:
1. Select the PROGAM 1 screen by pressing the PROG key and position the cursor on either
the Voltage or Frequency setting field.
2. Select the MEASUREMENT 1 screen by pressing the MEAS key. A small arrow will be
showing in front of either the Voltage or Frequency measurement readout.
3. The shuttle knob can now be used to increment or decrement the selected parameter.
If three-phase mode is selected in the MEASUREMENT 1 screen, slewing the knob while the
voltage is selected will change the output voltage on all three phases. If only one phase is
selected, only the output of the selected phase will be affected.
4.3.5 Changing Voltage Output Modes
The MX Series supports AC mode, DC mode and AC+DC mode (-3Pi only). The voltage mode
can be selected from the PROGRAM 2 screen, VOLT MODE field. The shuttle or +/- key will
toggle between available modes. It is recommended to set the initialization settings to the
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125
required operating mode so the unit powers up in the correct voltage mode1. If not, the mode
must be selected before applying output power to prevent applying to wrong type of voltage.
4.4 Waveform Management
[3Pi Controller only]
The MX Series with 3Pi controller employs independent arbitrary waveform generators for each
phase. This allows the user to create custom waveforms. In addition, three standard waveforms
are always available. This chapter covers issues that relate to defining, downloading and
managing custom waveforms.
4.4.1 Standard Waveforms
For most AC applications, a sine wave shape is used. The sine wave is one of the standard
waveforms provided on all MX Series models. This standard sine wave is always available and
is the default waveform at power-on. On MX models with the 3Pi controller, two more standard
waveforms are available, square and clipped.
Figure 4-31: Selecting a Waveform
The square wave provides a high frequency content waveform with relative fast rise and fall
times. Due to AC amplifier bandwidth limitations, the frequency content of the standard square
wave has been kept within the amplifier’s capabilities. As the fundamental frequency is
increased, the relative contribution of higher harmonics is reduced.
The clipped sine wave may be used to simulate voltage distortion levels to the unit under test.
The total harmonic distortion level may be programmed in percent using the CLIP LEVEL field of
the WAVEFORMS menu. Changing the distortion level of the CLIP waveform forces the AC
source to regenerate the CLIPPED sine wave’s data points and reload the waveform register
with the newly requested data. This process requires the output to be dropped briefly. To avoid
interrupting the voltage output to the unit under test, select a different waveform such as the
standard sine wave first, change the clip level and change the waveform back to the CLIPPED
sine wave. This will avoid any output interruption.
4.4.2 Phase Selection
Figure 4-32: Selecting Waveforms for Single Phase or All Phases
Different waveforms may be selected for each phase. The number of custom waveforms from
which to select remains 50 but each phase can be assigned a different custom or standard
waveform. The specific output phase for which the wave shape is programmed is selected with
1
If the mode is changed after power up and after the output relay is closed for the first time after power up, the measurement offset
calibration may not be correct. A phase mode change (-3Pi only) may be used to recalibrate the measurement offset.
MX Series
126
the PHASE key on the front panel. The selected phase is always shown in the top right hand
corner of the WAVEFORMS display.
To select the same wave shape for all three phases in a three-phase configuration, press the
PHASE key until the “øABC” enunciator appears in the top right corner of the WAVEFORMS
menu. Waveform selections made in this mode will apply to all three phases.
4.4.3 Creating Custom Waveforms
The 3Pi controller provides four groups of 50 custom defined waveforms each for a total of 200
waveforms in addition to the 3 standard waveforms. Of these four groups, one may be active at
a time. The active group is selected in the INITIAL SETUP menu.
Custom waveforms cannot be created from the front panel of the MX Series. Rather, they have
to be downloaded through one of the remote control interfaces. A Windows based program is
included with the MX Series that allows waveforms to be created and downloaded easily. This
Graphical User Interface program allows waveforms to be created by specifying harmonic
amplitudes and phase angles with respect to the fundamental. It also offers an arbitrary
waveform data entry mode that allows individual data points to be specified.
Figure 4-33: Custom Waveform Creation with GUI Program
Once downloaded, waveforms remain in non-volatile memory and will be visible in the
WAVEFORMS menu for selection. The user can assign a 12-character name to each custom
waveform. Avoid using any of the standard waveform names (SINE, SQUARE or CLIPPED) as
these names will not be accepted.
Waveforms may be deleted using the remote control interface as well. Custom waveforms
cannot be deleted from the front panel however to avoid accidental erasure.
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4.4.4 Waveform Groups
Waveform groups extend the number of available custom waveform to 200. Each group can
contain up to 50 user-defined waveforms. Groups are numbered 0 through 3 and may be
selected from the INITIAL SETUP 3 menu. To switch waveform groups, proceed as follows:
1. Press the MENU key three times to select the MENU 3 screen.
2. Move the cursor to the UTILITY entry and press ENTER. You are now in the UTILITY 1
menu.
3. Move the cursor to the INITIAL SETUP field and press ENTER. You are now in the INITIAL
SETUP 1 menu.
4. Move the cursor to the MORE field at the end of this menu and press the ENTER key. You
are now in the INITIAL SETUP 2 menu.
5. Move the cursor to the MORE field at the end of this menu and press the ENTER key. You
are now in the INITIAL SETUP 3 menu.
6. Move the cursor to the WAVE GROUP = field. You can now use the knob or the 0 through 3
key on the front panel to select a different waveform group.
7. Press ENTER to confirm your new selection.
8. To activate your new selection, YOU MUST CYCLE THE POWER so the AC source reinitializes. If the source is operated over the bus, a IEEE-488 Device Clear or reset
command (*RST) command will have the same effect.
The new wave group will be active after you turn the power to the unit back on.
4.4.5 RMS Amplitude Restrictions
The output of a sine wave may be programmed to the full rms value of the voltage range
selected. If the AC source is in the 300 V range, the maximum programmable rms voltage is 300
Volt. If a custom waveform is used however, the maximum programmable rms voltage may be
less than the maximum range value. The voltage range limit is based on the use of a sine wave
with a 1.414 crest factor. A 300 V rms sine wave has a 424 Volt peak voltage. The AC source
has a maximum peak voltage capability that is determined by the selected voltage range. If the
user selects a custom waveform with a crest factor that is higher than 1.414, the peak voltage
would exceed this maximum if the rms voltage were to be programmed at 300 V rms.
The MX Series power source automatically limits the maximum allowable programmed rms
voltage of a any custom waveform by calculating the crest factor of the selected waveform and
controlling the rms limit accordingly. Thus, each custom waveform may have a different
maximum rms value. The 3Pi controller will prevent the user from programming the rms voltage
above this limit. If a value is entered in the PROGRAM 1 menu above this value, a “Voltage
peak error” message is generated.
MX Series
128
Figure 4-34: Waveform Crest Factor Affects Max. rms Voltage
The figure shown here illustrates the relationship between the crest factor of the wave shape (or
its “peakiness”) and the maximum peak voltage allowed for a given voltage range. Since the
peak voltage cannot exceed the AC source’s capabilities, the programmable rms voltage has to
be restricted, in this case to only 167.8785 volt for the waveform on the left. The sine wave on
the right can be programmed to the full 300 V rms as this still falls within the same peak voltage
limitation of the AC source.
If the MX Series is used over the bus, the “:VOLT? MAX” query command can be used to
determine the maximum allowable RMS voltage for the selected waveform. Using the returned
value as part of a program will prevent range errors.
4.4.6 Frequency Response Restrictions
The user may create a waveform that contains any number of harmonic frequencies of the
fundamental. The AC Source itself however has a finite signal bandwidth and will attenuate
higher frequency components of the signal. To limit the maximum frequency component of the
output signal, the 3Pi controller automatically applies a band-pass filter to all custom waveforms
as they are downloaded. The controller implements the following process for user defined
waveforms:
Each down loaded waveform will have a computed frequency limit that is less than or equal the
maximum frequency limit of the AC source. The frequency limit is a function of the harmonics
content of the waveform and will follow the equation below.
Fmaxh = Fmax/(level * hn)
If Fmaxh is below the minimum frequency limit, the waveform will be rejected at down load time
and the label will be deleted from the waveform catalogue.
If the MX Series is used over the bus, the “:FREQ? MAX” query command can be used to
determine the maximum allowable fundamental frequency for the selected waveform. Using the
returned value as part of a program will prevent range errors.
Limits assume a program of full-scale voltage. No adjustments for voltage setting are made
below the full-scale value.
Waveform selection and frequency programming will be subject to the above limit. An error
message will be generated to reflect this type of error:
"22,Waveform harmonics limit"
Transient editing will also generate the above error during keyboard entry. Remote transient
entry will not check for the error until transient execution.
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129
The frequency domain VIEW mode in the WAVEFORMS menu may be used to visualize the
content of each custom waveform register on the LCD.
Figure 4-35: Waveform Frequency Domain View Mode
4.4.7 Switching Waveforms
Waveforms can be switched as part of the transient system. Each transient type setup menu has
a FUNCTION field. This field allows selection of any of the standard or custom waveforms
available in the selected group. Refer to the section on transients for more details on using
transient list to switch output waveforms.
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130
4.5 Standard Measurements
Standard measurements are always available through the MEAS key on the front panel. These
measurements are spread across two to four screens to enhance readability. Switching between
these screens can be done by successively pressing the MEAS button on the front panel. This
will cause the screen to cycle through all available measurement screens.
4.5.1 Standard Controller Measurements
For MX Series power sources with the –1 or –3 standard controllers, the following two
measurement screens are available:
Mode
VOLTAGE
CURRENT
FREQUENCY
POWER
VA POWER
PEAK CURR
POWER FACT
CREST FACT
MX Series
AC
DC
MEASUREMENTS 1
AC rms voltage
DC Voltage
AC rms current
DC Current
Frequency
n/a
Real power
power
MEASUREMENTS 2
Apparent power
power
Highest AC current
Highest DC current
found
found
Power factor
n/a
Crest factor
n/a
131
4.5.2 3Pi Controller Measurements
For MX Series with the -3Pi controller, the following four measurement screens are available:
Mode
VOLTAGE
CURRENT
FREQUENCY
POWER
VA POWER
PEAK CURR
POWER FACT
CREST FACT
VOLT THD
CURR THD
INST PK CURR
PHASE
AC
DC
MEASUREMENTS 1
AC rms voltage
DC Voltage
AC rms current
DC Current
Frequency
n/a
Real power
n/a
MEASUREMENTS 2
Apparent power
power
Highest AC current
Highest DC current
found
found
Power factor
n/a
Crest factor
n/a
MEASUREMENTS 3
Voltage distortion
n/a
Current distortion
n/a
Instantaneous peak
Highest DC current
current
found
Phase angle
n/a
AC+DC
AC rms voltage
AC rms current
Frequency
n/a
Apparent power
Highest AC
current found
Power factor
Crest factor
Voltage distortion
Current distortion
Instantaneous
peak current
Phase angle
The 3Pi controller has a fourth measurement screen for harmonics and trace analysis
measurements. This subject is covered in the next chapter.
Note: The V and I distortion calculations are based on H2 through H50 with the RMS current in
the denominator. Note that some definitions of THD use the fundamental component (H1) as the
denominator. This may result in different readings between instruments depending on the
implementation chosen.
Measurements are always running in the background. When the user selects a measurement
screen for display, the AC source first updates all the measurement parameters before
displaying the requested screen. This process may take up to a second. Consequently, pressing
the MEAS key may not always bring up the selected screen immediately. There will be a
perceptible delay. This will prevent the screen from appearing with invalid or blank readouts.
The measurement method for voltage and current will depend on the power source’s operating
mode. The following table shows the return value type (rms or average) and method of coupling
when the measurement command is initiated with a different extension at various operating
modes (AC, DC or AC + DC).
MX Series
Measurement
Extension
and Coupling
Operating Mode
AC
DC
AC + DC
AC
rms
rms
rms
DC
rms
rms
average
Coupling
AC
DC
DC
132
4.5.3 Accuracy Considerations
Any measurement system has a finite accuracy specification. Measurement specifications are
listed in Section 2. When using the AC source for measurement purposes, always consider
these specifications when interpreting results. Measurement inaccuracies become more
pronounced as the signal being measured is at the low end of the measurement range. This is
particularly relevant for low current measurements. The MX Series is a high power AC and DC
source optimized for providing and measuring high load currents. When powering low power
loads, measurement inaccuracies on rms and peak current measurements will greatly affect
derived measurements such as power, power factor and crest factor.
The measurement system on the MX Series I uses a data acquisition system with a 6.6 kHz
bandwidth in three-phase mode. The MX Series uses 16 kHz. This means that high frequency
components of the measured signal are filtered out. Any contribution to the rms value of voltage
and current above this cutoff frequency will not be reflected in the MX Series measurements.
When using an external measurement reference, this may account for discrepancies in
readings.
4.6 Advanced Measurements [3Pi Controller only]
The 3Pi controller offers advanced power analyzer measurement capabilities. These functions
may be accessed from the MEAS button or the MENU 2 screen. The phase for which the
analysis or waveform acquisition is done may be selected using the PHASE key in three phase
configurations. This chapter covers the use and application of these advanced measurement
functions.
4.6.1 Harmonic Analysis
The 3Pi controller’s power analyzer performs fast Fourier transformation (FFT) on both voltage
and current on each available phase. The resulting frequency spectrum can be displayed on the
LCD display in a tabular as well as a graphical mode.
4.6.1.1 Acquiring FFT data
To perform an FFT analysis on the output of the AC source, proceed as follows:
1. Press the MEAS button four times or until the HARMONICS/TRACE ANALYSIS screen
appears.
2. Move the cursor to the FUNCTION field and select VOLT or CURR. (The BOTH selection
will default to CURR as only one FFT result can be displayed at a time.)
3. Move the cursor to the VIEW field and select the TABLE or BAR display mode. The TRACE
display mode does not apply to FFT results.
4. Move the cursor to the DATA MODE field and select ABS or REL. Absolute display mode
will show all harmonic components in volts or amps. Relative display mode will use the
fundamental as a 100 % reference and display all harmonics as a percentage of the
fundamental. Phase angles are always shown with respect to the fundamental frequency.
The phase angle of the fundamental is always shown with respect to phase A.
5. Skip the SCALE field as it only applies to the TRACE display mode.
6. Move the cursor to the TRIG MODE and select SINGLE or CONT. The SINGLE mode will
acquire the data once and show the result. If you select CONT, the data will be updated
continuously.
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133
7. Move the cursor to the TRIG SOURCE field and select IMM. We will cover additional trigger
modes later.
8. Move the cursor to the START field and press the ENTER key. The display that you
selected will be shown. If you are in CONT trigger mode, the data will be updated about
once per second.
You can return to the HARMONICS/TRACE ANALYSIS screen by pressing the ENTER key. To
display the data in a different format, change to the selections you want and move the cursor to
the VIEW field. Pressing the ENTER key will re-display the data without triggering a new
acquisition. (This is true even if you were in CONT trigger mode.) To start a new acquisition, you
must go through the START field instead.
4.6.1.2 Analyzing FFT data
The data displays available for FFT data allow you to scroll through the entire data set. For
table displays, the UP and DOWN arrow keys may be used to scroll through the table data
vertically. The knob has no function while in this display mode. The triangle on the left edge of
the LCD screen points to the current position in the table.
Arrow indicator
can be moved up
or down using
UP/DOWN cursor
keys.
Figure 4-36: Scrolling Through Tabular FFT Data
Arrow indicator
points to
harmonic for
which readout is
shown on the
left. Can be
moved with
knob.
Bar chart format FFT data displays show the same data in a graphical format. While the
amplitude information is shown graphically, phase data is only displayed in numeric form to the
left for the currently selected harmonic component. The display can show up to 24 components
at a time. The triangle at the bottom of the display shows the currently selected component for
which numeric data is shown on the left. This data includes the harmonic number (DC through
50), the absolute or relative amplitude (depending on selected VIEW mode) and the phase
angle with respect to the fundamental. The knob can be used to scroll through the display
horizontally. The UP and DOWN cursor keys have no effect in this display mode.
Counter
Clock
wise
DECR
Clock
wise
INCR
Figure 4-37: Scrolling through bar chart FFT Data
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4.6.2 Waveform Acquisition
The waveform acquisition mode allows voltage and/or current data waveforms to be captured
and displayed. This mode is selected by choosing the VIEW =TRACE mode in the
HARMONICS/TRACE ANALYSIS screen. Voltage and current may be viewed separately or
combined into a single display using the FUNCTION field.
4.6.2.1 Acquiring waveform data
To perform a waveform acquisition on the output of the AC source, proceed as follows:
1. Press the MEAS button four times or until the HARMONICS/TRACE ANALYSIS screen
appears.
2. Move the cursor to the FUNCTION field and select VOLT, CURR or BOTH.
3. Move the cursor to the VIEW field and select the TRACE display mode.
4. Skip the DATA MODE field as it only applies to the TABLE and BAR display modes.
5. Move the cursor to the SCALE field and select a horizontal time base value to allows you to
see at least one cycle of the output waveform. If the output is programmed at 50 Hz, a 20
ms scale would display exactly one signal period.
6. Move the cursor to the TRIG MODE and select SINGLE or CONT. The SINGLE mode will
acquire the data once and show the result. If you select CONT, the data will be updated
continuously.
7. Move the cursor to the TRIG SOURCE field and select IMM. We will cover additional trigger
modes later.
8. Move the cursor to the START field and press the ENTER key. The display that you
selected will be shown. If you are in CONT trigger mode, the data will be updated about
once per second.
You can return to the HARMONICS/TRACE ANALYSIS screen by pressing the ENTER key. To
display the data in a different format or to select voltage instead of current or current instead of
voltage, change to the selections you want and move the cursor to the VIEW field. Pressing the
ENTER key will re-display the data without triggering a new acquisition. (This is true even if you
were in CONT trigger mode.) To start a new acquisition, you must go through the START field
instead.
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4.6.2.2 Analyzing waveform data
The data displays available for acquired waveform data allow you to scroll through the entire
acquisition buffer. For waveform displays, the knob can be used to scroll through the display
horizontally. The UP and DOWN cursor keys have no effect in this display mode.
Counter
Clock
wise
Readouts on the
left track the
vertical cursor
position on the
waveform.
Trigger point is
at 0.0 ms.
DECR
Clock
wise
INCR
Figure 4-38: Scrolling Through Acquired Waveform Data
The acquisition buffer may be longer than the selected horizontal scale in which case only a
portion of the acquisition window will be visible. The left portion of the LCD display is used to
read out the data under the vertical cursor. This cursor is a dotted line that can be moved using
the knob. If the left or right edge of the display window is reached, the entire display will shift so
the cursor always remains visible. The time from the trigger point to the vertical cursor is
displayed in the left hand portion of the LCD in ms. Also displayed here are the absolute voltage
and/or current value under the cursor.
To change the horizontal display scale without re-triggering an acquisition, press the ENTER
key to return to the HARMONICS/TRACE ANALYSIS screen, change the SCALE value, move
the cursor to the VIEW field and press ENTER. This will display the same data set at the new
scale without triggering a new acquisition.
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4.6.3 Triggering Measurements
Both FFT results and waveform acquisitions may have to be positioned at a specific moment in
time. To allow the data acquisition to coincide with user specified events, the measurement
system can be triggered in different ways. Trigger modes are available from both the bus and
the front panel. If one of the remote control interfaces is used, acquisitions may also be triggered
from the transient list system. Refer to the programming manual for details on this mode of
operation.
4.6.3.1 Trigger mode
The following trigger modes are supported by the MX Series 3Pi controller:
Single (SINGLE)
This mode causes the acquisition system to be armed only
once. The MX source waits for the user to press the ENTER
key while on the START field. As soon as the trigger event
specified occurs, data is acquired and the acquisition system is
put in an idle state. A new user initiated START event must be
given to trigger an new acquisition.
This mode is appropriate for capturing events that occur only
once such as the inrush current when turning on a load.
Continuous (CONT)
This mode causes the trigger system to re-arm itself after each
trigger event. Every time a new trigger event occurs, new data
is acquired and the LCD display is updated. No user
intervention is required after the initial START event.
This mode is appropriate for capturing repetitive events or to
monitor the source output continuously. Display updates will
occur about once per second.
4.6.3.2 Trigger source
The MX Series 3Pi controller offers a choice of trigger sources in front panel operation mode.
The following trigger sources are available from the HARMONICS/TRACE ANALYSIS, TRIG
SOURCE field:
Immediate (IMM)
This mode causes a trigger to occur as soon as the ENTER key
is pressed with the cursor on the START field. No trigger source
needs to be specified for this trigger mode. This mode is
equivalent to the INIT:IMM:ACQ bus command.
This trigger source is appropriate if no trigger condition is
known or desired. When using this trigger source, the
acquisition is always triggered.
Phase (PHASE A)
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This mode causes the MX acquisition system to wait for a
specified phase angle on the phase A voltage output. This
allows the acquisition to be positioned in time with respect to
any phase angle on phase A, B or C. Note that phase A, B and
C are typically at 0°, 240° and 120° with respect to the specified
trigger phase in this field. An example of this trigger source
mode is shown in Figure 4-40.
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When selecting this trigger source, the field below the TRIG
SOURCE field changed to “TRIG PHASE =“. Use this field to
enter the desired voltage phase angle to trigger the
measurement on.
This mode is appropriate when capturing analyzing events at a
specific phase angle such as the zero crossing of the voltage.
Note that the phase angle of the current with respect to the
voltage is determined by the load, so triggering at a specific
phase current angle is not possible as it is not controlled by the
AC source. However, when capturing current waveform data,
the phase relationship to the voltage can be determined easily
by triggering at the 0° point on the voltage.
Voltage step (SET VOLT)
This mode performs two functions. It programs the output
voltage for the selected phase or phases to the rms or DC value
specified and it triggers the measurement acquisition at the
same moment in time.
When selecting this trigger source, the field below the TRIG
SOURCE field changed to “SET VOLT =“. Use this field to enter
the desired voltage to program the output to and trigger the
measurement on. If only one phase in a three phase system is
selected, only that phase’s output will be programmed. If all
phases are selected, all three phases’ outputs will be
programmed. Use the PHASE key to select the desired phase
or all phases. Figure 4-39 shows an example of using the SET
VOLT trigger source to capture the turn-on of the voltage. In
this case, a negative trigger delay was specified and the voltage
start phase angle was set to 90° in the PROGRAM 2 screen.
TRIGGER
DELAY
START
[ENTER]
ACQUISITION WINDOW
TRIGGER =
SET VOLT 120
Figure 4-39: SET VOLT Trigger Source Acquisition
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This mode is appropriate for capturing the inrush current of a
load by programming the voltage to a specified value and
capturing the voltage and current at that moment in time. A
further refinement can be made by specifying the voltage start
phase angle in the PROGRAM 2 screen. If this field is changed
from RANDOM to 90°, the inrush current can be captured under
worst case conditions. In this case, the voltage should be
programmed to 0 volt before triggering the acquisition using the
START field.
Note:
MX Series
When using the SET VOLT trigger source, the output relay MUST be closed to
generate a trigger. If the output is open, the acquisition will be armed when the
START [ENTER] key is pressed but will wait for the trigger event. Closing the
output relay will generate the trigger event. If the output relay was already closed
when the START [ENTER] key is pressed, the trigger will occur immediately.
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4.6.3.3 Trigger delay
The trigger delay field allows the user the set the amount of pre- or post-trigger data that should
be used when positioning the data acquisition window with respect to the trigger moment.
POST-TRIGGER DELAY
A positive trigger delay value means the acquisition window is delayed by the amount of time
specified. In this case, the actual trigger moment itself is no longer present in the acquisition
buffer. This situation is shown in Figure 4-40 where a 20 ms trigger delay is used after triggering
on phase A = 180°. The fundamental frequency of the output is 50 Hz. The dashed line
indicates the trigger point. It occurs on the first 180 degree point that occurs after the user
presses the ENTER key while on the START field. Once the trigger occurs, the acquisition holds
off the specified 20 ms at which point the data requested is captured. Using a positive trigger
delay value always yields post trigger data.
Figure 4-40: Positive Trigger Delay (Post Trigger Data)
Positive trigger delay values may be set from 0.0 ms to 1000.0 ms (1 second) in 0.1 ms
increments. The value may be entered directly from the keyboard or using the knob.
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PRE TRIGGER DELAY
Alternatively, a negative trigger delay value may be specified up to the maximum time window
depth of the acquisition window. The value may be entered directly from the keyboard or using
the knob. The following time interval range is available:
Series I:
MX30/MX45 - single-phase mode:
104 msec to 1040 msec.
All models in three-phase mode:
Series II:
MX30/MX45 - single-phase mode:
42.6 msec to 426 msec.
All models in three-phase mode:
This situation is shown in Figure 4-41. The example shows a similar scenario as before, only
this time the trigger delay was set a -20 ms. Notice that the data acquisition window now
contains data that occurred before the user pressed the ENTER key to start the acquisition.
Figure 4-41: Negative Trigger Delay (Pre-Trigger Data)
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4.7 Transient Programming
4.7.1 Introduction
Transient programming provides a precise timing control over output voltage and frequency
changes. This mode of operation can be used to test a product for susceptibility to common AC
line conditions such as surges, sags, brownouts and spikes. By combining transient
programming with custom waveforms [3Pi Controller only], virtually any AC condition can be
simulated on the output of the AC source.
The default voltage mode is FIXED which means the output voltage is constant and remains at
the level set by the user. Changes made to the output voltage made from the PROGRAM 1
menu take effect immediately. In front panel operation mode, the voltage and frequency slew
rates (rate of change) are always at their maximum of 1E9 V/s and 1E9 Hz/s. Slew rate
programming is only possible over the remote control interface. On power up, the AC source
always reverts to the maximum slew rate for both voltage and frequency.
4.7.2 Using Transient Modes
The voltage can be programmed in the following transient operating modes:
STEP
causes the output to permanently change to its triggered value.
PULSE
causes the output to change to its triggered value for a specific time, as
determined by the Pulse menu parameters.
LIST
causes the output to sequence through a number of values, as determined by
points entered in the List menu.
FIXED
disables transient operation for the selected function.
4.7.3 Step Transients
Step transients let you specify an alternate or triggered voltage level that the AC source will
apply to the output when it receives a trigger. Because the default transient voltage level is zero
volts, you must first enter a triggered voltage before you can trigger the AC source to change the
output amplitude. Step transients can only be programmed through the bus, not the front panel.
Refer to the SCPI Programming Manual for more information about programming Step
transients and triggers.
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4.7.4 Pulse Transients
Pulse transients let you program the output to a specified value for a predetermined amount of
time. At the end of the Pulse transient, the output voltage returns to its previous value.
Parameters required to set up a Pulse transient include the pulse count, pulse period, and pulse
duty cycle. An example of a Pulse transient is shown in Figure 4-42. In this case, the count is 4,
the pulse period is 16.6 ms or 60 Hz and the duty cycle is 33%.
Figure 4-42: Pulse Transients
Note that Pulse transients can only be programmed over the bus, not the front panel. Refer to
the SCPI Programming Manual for more information about programming Pulse transients and
triggers.
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4.7.5 List Transients
List transients provide the most versatile means of controlling the output in a specific manner as
they allow a series of parameters to be programmed in a timed sequence. The following figure
shows a voltage output generated from a list. The output shown represents three different AC
voltage pulses (160 volts for 33 milliseconds, 120 volts for 83 milliseconds, and 80 volts for 150
milliseconds) separated by 67 millisecond, zero volt intervals.
Transient list programming is supported from the front panel and may be accessed by selecting
the TRANSIENTS entry in the MENU 1 screen. Transient lists can also be programmed over the
bus. Refer to the SCPI Programming Manual for more information about programming List
transients and triggers over the bus.
Figure 4-43: List Transients
The list specifies the pulses as three voltage points (point 0, 2, and 4), each with its
corresponding dwell point. The intervals are three zero-voltage points (point 1, 3, and 5) of equal
intervals. The count parameter causes the list to execute twice when started by a single trigger.
To set up this type of transient list, proceed as follows:
1. Press the PROG key to bring up the PROGRAM 1 menu.
2. Move the cursor to the VOLTAGE field and enter 0 Volt. Press ENTER to confirm your
setting.
3. Make sure you are in the HIGH voltage range as we will program a surge to 160 V rms. The
low range would only allow 150 V rms.
4. Press the MENU key to bring up MENU 1.
5. Move the cursor to the TRANSIENTS entry and press the ENTER key. You are now in the
TRANSIENTS menu.
6. Move the cursor to the VOLT SURGE/SAG entry and press the ENTER key. You are now in
the VOLT SURGE/SAG SETUP menu.
7. If you have a three-phase configuration and are in the three-phase mode, use the PHASE
key to select all three phases. (øABC will be displayed in the top right corner of the screen.)
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8. The START ø may be left at RANDOM as we are not interested in starting at a specific
phase angle. If a number is already present in this field, use the BACKSPACE (<-) key to
clear it.
9. Move the cursor to the GO TO VOLT field and enter 160.0
10. Move the cursor to the DUR SCALE field and set this field to TIME. We will be entering
delays in time rather than cycles since this example was stated in ms.
11. Move the cursor to the DURATION field and enter 0.033 seconds. Be sure not to enter 33
as this field is specified in seconds, not milliseconds. The highest time resolution available
for list transients is 1 ms or 0.001 s.
12. Move to the END VOLT field and enter 0.0. We want the voltage to return to 0 Volt after the
first burst.
13. Move the cursor to the END DELAY field and enter 0.067 for a interval delay of 67 ms.
Notice that we effectively combined steps 0 and 1 from Figure 4-43 into a single list event.
14. If you have an MX Series AC source, move down to the FUNCTION field and use the knob
to select SINE. The knob will allow you to scroll through all available wave shapes in the
active WAVE GROUP. If you have a –1 or -3 standard controller, this field will not be visible.
15. Move the cursor to the REPEAT field and enter 0. This means this event will be executed
once and not repeated. Do not confuse this event level repeat capability with the entire list
level repeat field, which we will use later.
16. Move the cursor down to the EVENT # field and enter a number from 1 through 99. The
transient list will be executed in order of event number. Leaving a gap between event
numbers allows you to insert events at different places later in the sequence. Deleting
events is always possible regardless of the event number. For the purpose of this exercise,
we will start with EVENT # 5. Enter 5 and press the ENTER key. This brings you back to the
TRANSIENTS menu.
17. Repeat steps 6 through 16 two more times using 120 V, 83 ms and 80 V, 150 ms as values
for EVENT # 10 and EVENT #15.
18. Once you have programmed these three events, move the cursor in the TRANSIENTS
menu to the START/VIEW SEQUENCE field and press the ENTER key. This will get you to
the START/VIEW TRANSIENT SEQUENCE menu from which you can run transient
programs. This screen shows all available events in the transient list on the right hand side.
If more than five events are programmed, you can scroll through the list using the UP and
DOWN arrow keys. To edit an existing event, move the cursor to the relevant event number
and press the ENTER key.
19. Move the cursor to the REPEAT #0 field and enter 1. This will cause the transient program
to repeat once and thus run two times total. Do not confuse this global list level repeat
capability with the list event level repeat field we skipped in step 15.
20. Make sure the output relay is closed using the OUTPUT ON/OFF key. If you start a transient
program with the relay open, an error message will appear.
21. Move the cursor to the START field and press the ENTER key. The transient program you
just created will execute two times. If you have an oscilloscope connected to the output, you
may be able to see the output voltage change per Figure 4-43.
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Note:
The AC source output remains at the last programmed values at the completion of
the list.
In three-phase mode, the voltage lists are phase selectable. You can set up a different voltage
list for each phase. To do this, use the PHASE key to choose the desired phase, as described in
the example. Note that fields common to all phases such as DURATION, END DELAY and
REPEAT always apply to all three phases in three-phase mode. When the cursor is moved to
any of these fields, the phase enunciator in the top right-hand corner always reverts to øABC.
Frequency transients are identical to voltage transients except they apply to all three phases at
all times in a three-phase configuration.
4.7.6 Programming Slew Rates
As shown in the previous examples there are a number of ways that you can generate custom
waveforms. Programmable slew rates provide additional flexibility when customizing waveforms.
Slew rates determine how fast the voltage or frequency is changed by the controller when a
step, pulse, or list transient is triggered. Slew rates cannot be programmed from the front panel
and are always set to their maximum values at power on. To use programmable slew rates, the
AC source must be programmed over the bus. Refer to the SCPI Programming Manual for more
information about programming slew rates.
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4.7.7 Switching Waveforms
The FUNCTION field available in each transient list event setup menu may be used to
dynamically switch waveforms during transient execution. This allows different waveforms to be
used during transient execution. Waveforms may be switched without the output of the source
being turned off. For three phase configurations, each phase has its own waveform list so
different waveforms may be programmed on different phases during transient execution.
Figure 4-44 illustrates the concept of using different waveforms at different steps in a transient
list. In this case, the change was programmed to occur at the zero crossing. Any phase angle
can be used to start the transient execution however. To keep the phase angle synchronization,
the dwell times have to be set to an integer number of periods. Over long periods of time, phase
synchronization may get lost due to timing skew between the waveform generator and the
transient state machine.
Figure 4-44: Switching Waveforms in a Transient List
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4.7.8 Transient Execution
Figure 4-45: START/VIEW TRANSIENT SEQUENCE Menu
A transient list can be executed from the START/VIEW TRANSIENT SEQUENCE menu. To
start a transient list, position the cursor on the START field as shown in Figure 4-45 and press
the ENTER key. Transients may be aborted by pressing the ENTER key again while on the
same field as the field changes to ABORT while a transient execution is in progress. For short
duration transients, this will likely not be visible, as the transient will complete before the screen
is updated. Longer duration transients however may be aborted in this fashion.
Longer duration transients may also be suspended using the PAUSE field located below the
START/ABORT field. Pressing the ENTER key while on the PAUSE field will suspend the
transient execution. Once suspended, it can be resumed using the same field as the field
changes to RESUME while the transient execution is suspended. Suspending a transient may
be useful when running slowly changing output transients to ‘hold’ the output at a specific setting
while observing the effect on the unit under test.
4.7.9 Saving Transient List Programs
When the AC source is turned off, the transient list that was programmed is not automatically
retained. Thus, if you turn the unit off, you will loose your programmed transient list. However,
transient programs may be saved in nonvolatile memory for later recall. This allows multiple
transient list programs to be recalled quickly without the need to enter all parameters each time.
Transient lists are stored as part of the overall instrument front panel setup in any of the
available setup registers.
To save the transient list you created in the previous example, proceed as follows:
1. Press the MENU key two times to bring up the MENU 2 screen.
2. Move the cursor to the SETUP REGISTERS entry and press the ENTER key.
3. The cursor will default to the SAVE REGISTER # position. Enter a number from 0 through 7
and press the ENTER key.
4. A message will appear at the bottom of the screen indicating that the front panel settings
and the transient list data have been saved in the setup register you selected.
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5. Principle of Operation
5.1 General
An explanation of the circuits in the MX Series is given in this section. Refer to Figure 5-1 for a
basic functional block diagram of the system. Figure 5-2 shows a more detailed system
interconnect for a MX-45-1 single-phase output unit. Other models have slightly different output
configurations.
Input
Transformer
AC
Input
Fuse
Block
POWER
MODULE A
K1/K2 Main
Contactor
& soft start
Output
Terminals
AC 3ø
POWER
MODULE B
Current
Voltage
Sense
Board
POWER
MODULE C
Main
CB
A
B
C
N
Range
Mode
Select
Ext.
Sense
System
Interface
Board
LV
Supply
Ext I/O
Keyboard /
Display
Gnd
Controller
CPU / Phase A
Remote
Interface
Controller
Phase B & C
IEEE-488 RS232C
Figure 5-1: MX Series Functional Block Diagram
5.2 Overall Description
Three-phase input power is routed from the back of the cabinet to a fuse holder terminal block
located in the bottom front of the unit. The lower front access panel has to be removed to gain
access to the AC input connection fuse block. From the fuse block, the AC input is connected to
the three-phase input transformer primary. The input transformer provides the required isolation
between input and output of the MX and accommodates various input voltage ranges by
employing multiple taps. Three sets of three-phase output secondaries are provided by the
transformer to produce three 140 VAC unregulated output AC buses. Each of these outputs is
fed into one of the power modules. (A, B and C) The power modules can be individually
removed although for most configurations, all three are required. The power modules are
located in the middle of the MX chassis and can be pulled out from the front after removing the
top access panel and disconnecting the power input and output wiring.
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Each power module contains a three-phase PFC power input module. The PFC module acts as
a boost converter using a PWM converter topology to generate a 450 VDC regulated bus. A
bank of high capacity electrolytic capacitors for each DC bus ensures ride through capability
during brown-outs and high current demands.
The DC bus provides power to the AC amplifier. Each amplifier in turn consists of four amplifier
modules labeled #1 (A1, A2) and #2 (A1, A2). These four amplifier modules are identical and
interchangeable but all four must always be present.
The output of the amplifier can be either AC, DC or a combination of AC and DC. The mode is
controller by the CPU controller based on user selection. All four amplifier modules within each
power module are controlled by a single Modulator board. The modulator board contains a high
frequency PWM modulator and additional control circuitry.
The CPU controller / oscillator assembly generates the reference waveforms and provides
frequency, amplitude, and impedance control. A current and voltage sense board is located at
the left bottom of the unit and is used to sense all output current and voltage for both control and
measurement purposes. The current sensor board, in conjunction with the CPU controller, also
supports the programmable RMS current limit function.
The system interface board controls all interaction between controller, power modules and
current sensor board. The system interface board is located in the top compartment of the MX
along with the controller.
Low voltage Power to the controller, amplifiers, system interface board and sensor board is
provided by a separate Low Voltage DC supply (LV Supply). This LV Supply takes three-phase
AC input directly from the AC input line through circuit breaker CB1 located on the front on the
MX. This circuit breaker functions as the main power on/off switch of the MX unit.
The LV Power Supply board converts the AC input into a number of isolated low voltage
regulated DC supplies that are distributed throughout the MX chassis. The LV power supply also
supplies coil power for all contactors, including the AC mains contactor (K2). A small fan is
located near the LV Supply to provide sufficient cooling of the supply and the other modules in
the top section of the MX.
The individual assemblies are described in more detail in the following paragraphs. Refer to
Figure 5-1 for an overall functional block diagram.
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5.3 Controller Assembly
The Controller Assembly is located in the top section of the MX unit. To access this assembly,
the top cover needs to be removed. The controller assembly consists of three printed circuit
boards connected by a ribbon cable. The controller contains the main oscillator, which
generates the sine wave signal setting the frequency, amplitude and current limit level. It also
senses the output voltage to provide closed loop control of the output. The controller also
handles all user interface and remote control related tasks.
MX Series I models use a three board set controller. On Series II models, the controller uses a
two board set instead (7003-718-2 or 7003-718-4 assembly). The function of each of the boards
that make up the controller module is described in the following paragraphs.
5.3.1 CPU Controller
This board assembly, A2-A7, consists of the components for the CPU (DSP), generating the
Phase waveform signal to the power amplifier, programmable impedance (MX30-3Pi or MX453Pi model only) and all of the program, waveform and data memory. In addition, the waveform
board contains the circuits for all measurements. The clock and lock circuit required to support
the clock and lock mode of operation of multiple MX units is also on this board assembly.
On MX Series I units, this board contains only Phase A circuitry in addition to the CPU logic. On
MX Series II unit, all three phases are contained on the same board. If the -413 option is
present, a separate inter harmonic generator board is connected to the CPU board.
5.3.2 Phase B and C Board (MX Series I only)
This assembly, A8, has the waveform, measurement and impedance programming components
for the Phase B and C power modules. This board is not installed in an MX45-1 single-phase
power system but is present for all other configurations.
5.3.3 Keyboard / Display Board
The keyboard/display assembly is assembly A2-A9. It is mounted to the front panel and holds
the 23 rubber keys. It also has the LCD graphics display. A shaft encoder is mounted on the
board that is used as a shuttle input to allow slewing of setup parameters. If the MX system is
used over one of the remote control interfaces, the keyboard functions can be locked out by
asserting the REMOTE state. See the MX Series Programming Manual (P/N 9003-961) for
details.
5.3.4 GPIB / RS232 or GPIB / RS232 / USB / LAN IO Board
This board assembly is identified as A1. It has the IEEE 488, RS232 and USB transceivers and
optionally an Ethernet interface (-LAN option). USB and LAN are available on top assembly
7003-427 MX models only. It also has isolators to provide safety isolation for both interfaces and
additional user accessible I/O lines. Additional user accessible inputs and outputs available
through this assembly are:
•
•
•
•
•
•
•
MX Series
Trigger Input BNC
Trigger Output BNC
Function Strobe BNC
Remote Inhibit (terminal strip)
External Sync (terminal strip)
Clock BNC (option)
Lock BNC (option)
151
•
MX Series
Output Status (Available on top assembly 7003-427 only.)
152
User Manual - Rev AP
Figure 5-2: MX Series Detailed Block Diagram
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Figure 5-3: Power Module Detailed Block Diagram
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5.4 System Interface Board
The System Interface Board is located in the top section of the MX unit. To access this
assembly, the top cover needs to be removed. The System Interface board, A6, receives the
oscillator signal from the CPU controller assembly for all phases and passes it through to all
three amplifiers whose gains are controlled by a signal from the over current circuit. The over
current circuit senses the RMS value of the current. If the load current exceeds the
programmed value, the output of this sensing circuit reduces the amplitude of the oscillator drive
signal. The output of the unit then becomes a constant current output, with the output voltage
dropping as the load increases.
The System interface also monitors a variety of status signals from the amplifiers. This includes
PFC good, over temperature signals and DC bus regulation good signals. If any status signal is
false, the system interface board will shut down the MX. At power on, all status signals have to
return good (TRUE) or the MX system power up sequence will be halted.
Finally, the System interface assembly also routes the required system interface bus signals
between multiple MX45 chassis for multi-box configurations (MX60, MX90 and MX135). A DB37 to DB-37 system interface cable is used to connect two or more MX units in a multi-box
configuration. Each MX30 or MX45 provides two sets of system interface connectors on the
rear-panel. One is the master out (unit with CPU controller assembly installed), the other the
Auxiliary in. ((unit without CPU controller or with CPU controller disabled.) The CPU controller
can be disabled using the internal DIP switch located on the GPIB / RS232C / IO assembly.
(Requires removal of the top cover).
5.5 Current / Voltage Sensor Board
The current and voltage sensor board, A4, senses the output current and voltage of all three
amplifiers and feeds this information back to the system interface board. These same signals
are also used by the controller for all measurement functions. Voltage sense is accomplished
either internally or externally. For best voltage regulation at the EUT, external sense connections
should be made using the External Sense terminal block located at the top of the back-panel.
Alternatively, internal sense mode may be selected. In this case, the voltage is sensed at the
sensor board.
5.6 Low Voltage Power Supply
The Low Voltage power supply is mounted behind the system interface board in the top section
of the MX chassis. This assembly generates all required low voltage DC outputs. These
outputs from the LV Power supply provide analog and logic power to all the modules.
a) +/- 19 V to the System Interface board and power modules.
b) + 9 V to the oscillator.
c) + 24 V to all contactors and LV cooling fan.
d) Isolated + 8 V for the GPIB/RS232 board.
Two green LED’s on the system interface board are lit when the ± 15 V and ± 19 V are in
regulation. If an overload condition causes the output to drop more than 10% or the output has
failed, the corresponding LED will extinguish. This feature is helpful in troubleshooting the unit.
See Service section 6.
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5.7 Power Module
Each MX chassis accommodates three power modules. These power modules are located in
the center of the chassis and can be removed from the front after removing the front cover. Each
power modules is fully self-contained and forms a complete AC to AC or AC to DC converter.
The three power modules are identical and can be interchanged if needed although this is not
recommended under normal use.
The power module is depicted in Figure 5-4.
Figure 5-4: Power Module Layout
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5.7.1 PFC Input Power Converter
The PCF section is located at the bottom of each power module. AC power enters the power
module at the PFC input section. The PFC section using a PWM boost converter to turn the
unregulated three phase 140 V AC into a regulated ± 225 V DC bus. A bank of capacitors is
used to provide ride-through and to support high peak current demands from the amplifier
boards. The PFC PWM circuit drives a set of three high capacity IGBT's. These IGBT's connect
directly to the DC bus bars, which connect the PFC output to the Amplifier boards.
The condition of the PFC section is constantly monitored and reported to the system interface
board. If the DC bus goes out of acceptable operating range, a fault is generated. Furthermore,
in any of the three AC input phases fails, the MX will shut itself down.
5.7.2 Modulator Board
The modulator board is located directly above the PFC board and next to the four-board
Amplifier stack. The modulator board accepts an oscillator output reference signal as input and
drives the four amplifier boards using a high frequency PWM technique. The modulator has the
ability to drive the amplifiers in either parallel or series configuration, thus producing either a high
(300 Vac ./ 400 Vdc) or low (150 Vac / 200 Vdc) output voltage range. Note that some
configurations of the MX Series may be hardwired for single range use.
The modulator contains several feedback loops that control the current sharing and output
regulation of the four power amplifier boards. The Modulator boards connects to one of the
three connectors on the System interface through a 50 pin ribbon cable located at the top front
of each power module.
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5.7.3 Amplifier Boards
The Amplifier boards are each attached to a heat sink and stacked on top of each other at the
top portion of the power module enclosure. Sets of two boards are held together by a bracket
which screws into the back wall of the power module enclosure. Power to each amplifier board
is supplied from the PFC section through a set of DC bus bars. Each amplifier board connects
to the modulator board via a small ribbon cable. Each Amplifier board has four outputs (A+. A-,
B+ and B-). These four outputs connect to a set of Inductor boards using stranded wires with
Anderson style connectors. The connection between the Amplifier boards and the Inductor
boards is specific and should not be reversed or damage could result. The output wire
connectors of each amplifier board are color coded to help identify the correct connections. The
connections between the Modulator board and the Amplifier boards are one to one. (Connectors
line up with amplifier boards).
The layout of the Amplifier board is shown in Figure 5-5.
Figure 5-5: Amplifier Board Layout
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5.7.4 Filter Boards
A set of two identical inductor boards is located behind the Modulator board and next to the four
amplifier boards. One filter board handles the "A" output, the other handles the "B" output. In
addition to the filtering function performed by these boards, the inductor boards also contain
current sensors that are used in the feedback loop of the amplifier. The output of these current
sensors is routed to the modulator board to regulate current sharing and peak current limiting.
5.7.5 Fan Supply Board
The Fan Supply board is located in the wind tunnel of the PFC section at the bottom of the
power module. This board provides variable speed control for the dual fans of the power
module. Fan speed is a function of the load current sensed. This provides for lower levels of
audible noise during minimal load conditions.
5.7.6 Output Snubber Board
A small output snubber board is attached to the output terminals of each power module. This
snubber provides the required operating stability of the amplifiers.
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CAUTION
VOLTAGES UP TO 480 VAC AND 500 VDC ARE PRESENT IN
CERTAIN SECTIONS OF THIS
POWER SOURCE. THIS EQUIPMENT GENERATES
POTENTIALLY LETHAL VOLTAGES.
DEATH
ON CONTACT MAY RESULT IF PERSONNEL FAIL TO
OBSERVE SAFETY PRECAUTIONS. DO NOT TOUCH
ELECTRONIC CIRCUITS WHEN POWER IS APPLIED.
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6. Calibration
The Routine Calibration should be performed every 12 months. Non-routine Calibration is only
required if a related assembly is replaced or if the periodic calibration is unsuccessful.
Calibration of the MX system can be performed from the front panel or over the bus. The MXGUI
program provides several calibration screens for this routine calibration but not for non-periodic
calibration. This section covers calibration from the front panel. Refer to the MXGUI on line help
for information on using the MXGUI program to perform routine calibration.
Full-scale output calibration is done using the internal measurement system. As such, it is
important to calibrate the AC and DC voltage measurements before performing an AC and DC
full-scale output calibration.
Note:
Perform the Measurement calibration first.
The cardinal calibration points used during calibration are chosen to obtain optimal performance
at the typical operating points of the MX Series. If the typical application in which the MX system
is used is unusual, it may be better to calibrate it at different operating points than the ones used
in this manual. Also, if the required load values for current calibration are not available, the
programmed voltage may be adjusted to obtain the approximate current (typically close to
maximum available current per phase).
6.1 Recommended Calibration Equipment
Digital Multimeter:
1 mOhm Current Shunt:
Load Bank:
Fluke 8506A or equivalent / better.
Isotek Model RUG-Z-R001-0.1.
Various high power load resistors or a resistive load bank will
be needed. (E.g. Avtron ) Size of the load bank depends on
model and phase mode. A load is required to perform the
current measurement calibration near full scale. Current
measurement calibration should be done on the lowest
available voltage range.
The accuracy and value of the load resistor is not critical as
long as the current drawn is sufficient to operate the AC Source
in the upper current range (80-100 %). Suggested values of
load bank settings are shown in Table 6-1.
PC with CI MXGUI:
Optional.
For MX30-3Pi or MX45-3Pi programmable Impedance calibration only:
Digital Phase Meter:
Krohn-Hite model 6610 or 6620 (GPIB) or equivalent.
0.02° accuracy, 0.01° resolution or better.
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6.2 Front Panel Calibration Screens
The calibration screens for output or measurement calibration can be selected from the MENU 3
screen. (Press MENU button several times to toggle to MENU 3 screen.)
To select the OUTPUT CALIBRATION screen press the ↑ or ↓ key several times to highlight
OUTPUT CAL. Then press the ENTER key. This will bring up the PASSWORD screen. To
prevent unauthorized access to calibration data, a password must be entered to access any
calibration screen. The calibration password is always "5000" and may be entered using the
numeric keypad. Once entered, the calibration screens remain accessible until the MX unit is
powered down.
Type 5000 and press the ENTER key to show the OUTPUT CALIBRATION screen.
On MX systems with three-phase output capability, use the PHASE key on the front panel to
select the phase to be calibrated.
To select the MEASUREMENT CALIBRATION screen, follow the same steps as outlined above
but select the MEASUREMENT CAL entry instead of OUTPUT CAL. If another CALIBRATION
screen has been accessed since power-up, no password is needed. Otherwise, enter the same
password as indicated above.
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DMM
HI
LO
3ø
AC Line
Input
Connect
A and N
SENSE LEADS
N
A EUT
CONNECTION
Figure 6-1: Calibration Setup MX45-1 (Rear view)
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DMM
HI
LO
3ø
AC Line
Input
Connect
A, B or C
SENSE LEADS
EUT
N C B A CONNECTION
Figure 6-2: Calibration Setup MX30-3Pi, MX45-3Pi or MX30-3, MX45-3 (Rear view)
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6.3 Routine Measurement Calibration
The MX Series controller measures voltage and current by digitizing both voltage and current
waveforms on each available output phase. This data is subsequently processed and use to
calculate all measurement parameters such as VRMS, IRMS, Power, VA, Frequency etc. To
calibrate all measurements, only the voltage and current measurement need to be calibrated
specifically. All other measurements are derived from these.
Connect the test equipment to the power source as shown in Figure 6-2. If the power system is
a multi-phase system with one controller, the DVM for calibrating the measurement voltage
should always be connected to the Remote Sense connector on the Master cabinet.
Note:
The Fluke 8506A Digital Multimeter must be used for the following calibration.
The 8506A must be set to the AC HI ACCUR mode for all AC measurements.
The shunt must be connected to the power source as shown in Figure 6-3. If the Current
Measurement can’t be successfully performed, adjust the Current Measurement Pot on the
System Interface board. This adjustment is described in the Non-routine Calibration section of
this manual. If the DC current measurement displays more than 70 counts on the display,
perform the non-routine current monitor adjustment.
Figure 6-3: Current Measurement Calibration Setup (Rear view)
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Connect the load to the output. Use the 1 mOhm current shunt in series with the load to
measure the AC and DC load current. When programming a DC load always program the
output voltage to 0 volts before changing the output load. This will prevent load switch contacts
from being damaged.
To calibrate all measurement functions, the desired value for the measurement value of current
or voltage must be entered for the corresponding calibration value. Make the indicated
adjustments by typing in the desired display value. This should be the value indicated by the
external DVM. If a 1 mOhm current shunt is used for current, 30 mV represents 30 amps.
The Calibration Load Table shows required load bank settings for the current measurement
calibration procedure. The following text is a detailed explanation of the procedure.
Note that the voltage measurement calibration is only required on the high voltage range. The
same voltage measurement calibration coefficients are used on both voltage ranges (if
available).
Note that the current measurement calibration is only required on the low voltage range –
maximum available current range. The same current measurement calibration coefficients are
used on both voltage ranges (if available). Suggested load values are shown for either voltage
range in case the MX configuration used only has a single voltage range. (MX45-N-150 or
MX45-N-300).
PARAMETER
POWER SYSTEM
Model --->
Lowest Range
MX30-1 / MX303Pi 1 phs mode
MX30-3 /
MX30-3Pi 3
phs mode
MX60-3(Pi)
AC Current Full Scale
0.48 Ω, 30 kW
1.5 Ω, 10 kW
0.75 Ω, 20 kW
DC Current Full Scale
0.9 Ω, 15 kW
2.67 Ω, 5.kW
1.34 Ω, 10.kW
DC Current Zero Scale
80 Ω, 350 W
80 Ω, 350 W
80 Ω, 350 W
1.9 Ω, 30 kW
5.7 Ω, 10 kW
2.8 Ω, 10 kW
2.9 Ω, 15 kW
8.7 Ω, 5.kW
4.3 Ω, 5.kW
80 Ω, 350 W
80 Ω, 350 W
80 Ω, 350 W
150 VAC / 200 VDC
300 VAC / 400 VDC
PARAMETER
Model --->
Lowest Range
POWER SYSTEM
MX90-3(Pi)
MX135-3(Pi)
0.33 Ω, 44 kW
1.0 Ω, 14.4 kW
0.5 Ω, 30KW
0.33 Ω, 44 kW
0.9 Ω, 28.5 kW
2.67 Ω, 9.6.kW
1.33 Ω, 7.5KW
0.9 Ω, 28.5 kW
80 Ω, 350 W
80 Ω, 350 W
80 Ω, 350 W
80 Ω, 350 W
1.2 Ω, 44 kW
4.0 Ω, 14.4 kW
2.0 Ω, 30KW
1.2 Ω, 44 kW
3.6 Ω, 28.5 kW
10.67 Ω, 9.6.kW
5.3 Ω, 7.5KW
3.6 Ω, 28.5 kW
80 Ω, 350 W
80 Ω, 350 W
80 Ω, 350 W
80 Ω, 350 W
150 VAC / 200 VDC
300 VAC / 400 VDC
Table 6-1: Calibration Load Values
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6.3.1 Measurement Cal - AC
To calibrate AC measurements, set the power source to the AC mode. Select the
MEASUREMENT CAL entry from the MENU 3 screen. Refer to section 4.2.13 for relevant LCD
screen.
Note:
For the following calibration steps put the external Digital Multimeter into the AC
mode.
AC Volt Full-scale:
Program the output to the 300 VAC range. Close the output
relay. Program the output to 240 VAC and 60 Hz. Go to the
MEASUREMENT CALIBRATION screen. Enter the actual AC
output voltage for the VOLT FS parameter and press the
ENTER key. Save this value by pressing the SET key
(Series I models only).
AC Current Full-scale:
Apply a load to the output. Refer to Table 6-1. Program the
output to 120 VAC on the 150 VAC range and 60 Hz. (If a 150
VAC range is not available, select the 300 VAC range and
program the same 120 VAC output.)
Observe the actual output current and enter this value for the
CURR FS parameter. Press the ENTER key. Save this value
by pressing the SET key (Series I models only).
6.3.2 Measurement Cal - DC
To calibrate DC measurements, set the power source to the DC mode. Select the
MEASUREMENT CAL entry from the MENU 3 screen. Refer to section 4.2.13 for relevant LCD
screen.
Note:
For the following calibration steps put the external Digital Multimeter into the DC
mode.
DC Volt Zero:
[Applies to MX Series I only] Go to the PROGRAM 2 screen
and program the DC mode. Go to the PROGRAM screen and
select the 400 V range. Set the output to +2.0 volts. Go to the
MEASUREMENT CALIBRATION screen and enter the value
displayed on the external meter for the VOLT ZERO parameter.
Save this value by pressing the SET key.
DC Volt +Full-scale:
Program the output to +320 volts. Go to the MEASUREMENT
CALIBRATION screen. Enter the actual DC output voltage
displayed on the external multimeter for the VOLT FS
parameter and press the ENTER key. Save this value by
pressing the SET key (Series I).
DC Current Zero:
[Applies to MX Series I only] Select the 200 Volt DC range and
program 0 volts. Apply a 80-Ohm, 350-watt rated resistive load
to the output. This resistor will represent approximately a 2amp load. Program the output to 160 volts. (If a 200 Volt DC
range is not available, select the 400 V DC range and program
the same 160 V output.)
If an 80 Ohm load is not available, select a load and voltage
setting that produces the same 2.0 A current.
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Enter the actual DC load current for the CURR ZERO
parameter in the MEASUREMENT CALIBRATION screen and
press the ENTER key. Save this value by pressing the SET
key.
DC Current Full-scale:
Program the output to 0 volts on the 200 range. Apply load
resistor to the output. Refer to Table 6-1. Program 160 volts.
Enter the actual output current for the CURR FS parameter in
the MEASUREMENT CALIBRATION screen. Save this value
by pressing the SET key (Series I models only).
6.3.3 Three Phase Mode
As indicated earlier, for three-phase power systems, repeat the preceding steps for the Phase B
and C outputs. The order in which the outputs for each phase are calibrated is not important.
Press the PHASE key to select each output to be calibrated. Monitor the output of the
respective phase by moving the HI input of the Digital Multimeter and the current shunt as
needed. The LO input should remain connected to the common LO of the sense connector.
For the MX30-3Pi/MX45-3Pi operating in single-phase mode, it will be necessary to repeat the
current measurement calibration while the MX30-3Pi/MX45-3Pi is in the single-phase mode as it
maintains specific current measurement calibration coefficients for this mode. The load values
shown in Table 6-1 for MX30-1 and MX45-1 should be used on phase A only. The voltage
measurement calibration does not have to be repeated in single-phase mode as the same
coefficients for phase A are used in either phase mode.
6.3.4 Measurement Calibration Summary
The following Table is a summary of the preceding calibration steps. The value indicated by the
External DVM is called VAC or VDC. The current measured by the current shunt is called IAC or
IDC.
TITLE
AC MODE
AC Volt Full-scale
AC Current Full-scale
DC MODE
DC Volt Zero
(P/N 7003-400 only)
DC Volt + Full-scale
DC Current Zero
(7003-400 only)
DC Current Full-scale
PROGRAM/LOAD PARAMETERS
PARAMETER
ADJUST TO
300 VAC Range, 240 VAC, 60 Hz, no load
150 VAC Range, 120 VAC, 60 Hz, full load
to 90% of max current range.
VOLT FS
CURR FS
VAC
IAC
400 VDC Range, +2.0 VDC, no load
VOLT ZERO
VDC
400 VDC Range, + 320 VDC, no load
200 VDC Range, 160 VDC, 80 ohm load
VOLT FS
CURR ZERO
VDC
IDC
200 VDC Range, 160 VDC, full load to 90%
of max. current range.
CURR FS
IDC
Table 6-2: Measurement Calibration Table
For a multi-phase power system, repeat Paragraph 6.3 for each phase. Move the external test
equipment to the phase that is being calibrated. Refer to Figure 6-2.
While viewing the calibration screen, press the PHASE key to select the respective phase.
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6.4 Routine Output Calibration
For best results, it is recommended to perform the measurement calibration procedure first. See
section 6.3. The MX Series I has more calibration coefficients than the MX Series II. Where
relevant, this is indicated. On Series II models, the output calibration screens will show only
available cal factors.
Follow the steps outlined in this section to perform a routine output calibration. Note that each
available output range (except -HV and -XV options) has its own output calibration coefficients
and must be calibrated. If a range is not available on the system configuration you have (e.g.
MX45-1 or MX45-3 without -R option), skip to the relevant output range. Table 6-3 shows the
individual calibration points in a summary format. The following text is a more detailed
explanation of the procedure.
The full-scale calibration should be done in the AC and DC mode for both the low and high
range if available. The option -HV range can be done only if the high range (300VAC) is not
available. If both the standard high range and the -HV or -XV optional ranges are available,
calibrate the standard range.
Note: Selecting the calibration screen (by entering the Cal Password) will turn off the ALC
mode. Conversely, turning on the ALC mode will turn off the Calibration mode. If the ALC mode
is turned off during calibration, the cal password will have to be re-entered to allow calibration.
Setup:
Connect the test equipment to the power source depending on model configurations as shown
in Figure 6-1and Figure 6-2. Setup for an MX60, MX90 or an MX135 configuration is similar to
that shown in Figure 6-2 with the master sense terminal block used for external voltage sense.
For multi-phase systems, each phase has to be calibrated individually. Note that no load is
required for most output calibrations.
DC Offset measurements:
If the DMM used to perform DC offset calibration has trouble rejecting AC noise in VDC mode
(measurement not stable), it may be necessary to use a small filter circuit at the output of the
amplifier to measure the DC offset. A 100Kohm RN60 1/4W (CI P/N 560131) and 22uF, 35V (CI
P/N 611267) series network can be used in this case as shown below. Use this circuit only while
performing DC offset checks and remove for other calibrations.
High
AMPLIFIER
OUTPUT
Low
22 uF
100 Kohm
Pos
DMM
VDC
Neg
Figure 6-4: DC offset AC filter
MX Series
169
6.4.1 Output Cal Series II only
300 VAC Range DC Zero:
Program the output to the 300 VAC Range by pressing and
selecting the 300 Range with the shuttle. Program the output to
0.0 volts and 60 Hz. Go to the OUTPUT CAL screen, select the
VOLT ZERO parameter and adjust the output to 0.0 ± 0.005
VDC. Save this value by pressing the ENTER key.
300 VAC Range High Freq DC Zero:
Required for Series II models with –HF option only.
0.0 volts and 820 Hz. Go to the OUTPUT CAL screen, select
the VOLT ZERO parameter and adjust the output to 0.0 ± 0.005
VDC. Save this value by pressing the ENTER key.
To calibrate AC output, set the power source to the AC mode, high voltage range. For MX units
with the –HV optional range, use the 300V range for all calibrations. Select the OUTPUT CAL
entry from the MENU 3 screen. Refer to section 4.2.14 for relevant LCD screen.
300 VAC Range Full-scale:
Before programming the output voltage, first set the ALC mode
to OFF in the UTILITY, VOLT/CURR CONTROL screen. Then
select the 300 VAC Range from the Program 1 screen.
Program the output to 240.0 volts and 60 Hz and close the
output relay. Go to the OUTPUT CAL screen, select the VOLT
FS and enter 20000. With the shuttle, adjust this value to
obtain 240 ± 0.05 volts at the output as measured with an
external DMM. Use the ENTER key to save this value.
6.4.2 Output Cal 150 V AC Range (Series I only)
To calibrate AC output, set the power source to the AC mode, low voltage range. Select the
OUTPUT CAL entry from the MENU 3 screen. Refer to section 4.2.14 for relevant LCD screen.
For Series II MX units, proceed to section 6.4.3 as there is only one calibration range.
[Applies to MX Series I only] Press the PROGRAM key and
select the 150 Range with the shuttle. Program the output to
0.0 volts. Go to the Output Calibration, press the PHASE key to
select the phase to be calibrated and select the VOLT ZERO
parameter. Close the Output Relay by pressing the OUTPUT
ON/OFF key. Monitor the DC output voltage with the external
DVM. With shuttle control adjust the output voltage for 0.0 ±
0.005 VDC. Save this value by pressing the SET key.
150 VAC Range Full-scale:
program 120.0 volts and 60 Hz. Once the output settings are
made, turn on the ALC mode and allow the output on all phases
to settle. Next, proceed to the output calibration screen. Select
the VOLT FS parameter and enter the set voltage in the fullscale calibration window followed by the ENTER key. A value
between 0.9 and 1.1 will appear in the window. Save this value
by pressing the SET key.
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170
150 VAC Range HI Freq:
program the output to 120.0 volts and 400 Hz. Go the OUTPUT
CAL screen and select the V HI FREQ parameter. Adjust the
output with the shuttle for an output of 120.0 ± 0.05 volts.
Repeat the 60 Hz and 400 Hz adjustments until the output is
within ±0.05 volts of the programmed value. Save this value by
pressing the SET key.
6.4.3 Output Cal 300 V AC Range(Series I only)
To calibrate AC output, set the power source to the AC mode, high voltage range. For MX units
with the –HV optional range, use the 300V range for all calibrations. Select the OUTPUT CAL
entry from the MENU 3 screen. Refer to section 4.2.14 for relevant LCD screen.
0.0 volts and 60 Hz. Go to the OUTPUT CAL screen, select the
VOLT ZERO parameter and adjust the output to 0.0 ± 0.005
VDC. Save this value by pressing the SET key.
300 VAC Range Volt Full-scale: Program the output to 240.0 volts and 60 Hz. Once the output
settings are made, turn on the ALC mode and allow the output
on all phases to settle. Next, proceed to the output calibration
screen. Select the VOLT FS parameter and enter the set
voltage in the full-scale calibration window followed by the
ENTER key. A value between 0.9 and 1.1 will appear in the
window. Save this value by pressing the SET.
300 VAC Range Volt HI Freq:
[Applies to MX Series I only] Program the output to 240.0 volts
and 400 Hz. Go to the OUTPUT CAL screen and select the V
HI FREQ parameter. Adjust the output with the shuttle for an
output of 240.0 ± 0.05 volts. Repeat the 60 and 400 Hz
adjustments until the output is within ±0.05 volts of the
programmed value. Save this value by pressing the SET key.
6.4.4 Output Cal 200 V DC Range (Series I only)
200 VDC Range Volt Zero:
[Applies to MX Series I only] Press the PROGRAM key. Select
the MORE option to go to the PROGRAM 2 screen. Highlight
the VOLT MODE parameter and select the DC Mode by moving
the shuttle. Press the PROGRAM key and select the 400 VDC
Range. Program 0.0 VDC. Go to the OUTPUT CAL screen and
adjust the VOLT ZERO for 0.0 ± 0.005 volts DC on the output.
Save this value by pressing the SET key.
200 VDC Range + Full-scale:
[Applies to MX Series I only] Program +160.0 volts DC. Once
the output settings are made, turn on the ALC mode and allow
the output on all phases to settle. Next, proceed to the output
calibration screen. Select the VOLT +FS parameter and enter
the set voltage in the full-scale calibration window followed by
the ENTER key. A value between 0.9 and 1.1 will appear in the
window. Save this value by pressing the SET key.
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6.4.5 Output Cal 400 V DC Range(Series I only)
400 VDC Range Volt Zero:
Press the PROGRAM key. Press the PROGRAM key and
select the 400 VDC Range. Program 0.0 VDC. Go to the
OUTPUT CAL screen and adjust the VOLT ZERO for 0.0 ±
0.005 volts DC on the output. Save this value by pressing the
SET key.
400 VDC Range + Full-scale:
[Applies to MX Series I only] Program + 320.0 volts. Once the
output settings are made, turn on the ALC mode and allow the
output on all phases to settle. Next, proceed to the output
calibration screen. Select the VOLT +FS parameter and enter
the set voltage in the full-scale calibration window followed by
the ENTER key. A value between 0.9 and 1.1 will appear in the
window. Save this value by pressing the SET key.
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172
6.4.6 Three Phase Mode
As indicated earlier, for 3-Phase power system, repeat the preceding steps for the Phase B and
C outputs. The order in which the outputs for each phase are calibrated is not important.
Press the PHASE key to select each output to be calibrated. Monitor the output of the
respective phase by moving the HI input of the Digital Multimeter. The LO input should remain
connected to the common LO of the sense connector.
For the MX45-3Pi operating in single-phase mode, the output voltage calibration does not have
be repeated in single phase mode as the same coefficients for phase A are used in either phase
mode.
6.4.7 Phase Angle Calibration
Output phase angle calibration is required only on MX Series models capable of three-phase
mode operation. A phase meter is required to perform this calibration.
This calibration can be done in either high or low voltage range as long as the maximum input
voltage of the phase meter input is not exceeded. Select AC mode, thee-phase mode, 120Vac.
60 Hz. Program all three-phase outputs to the same voltage.
For best results, the output of all amplifiers should be loaded to at least 80% of full scale voltage
current on all phases at the same time. This requires a three-phase load. If no such load is
available, perform this calibration with no load.
Proceed as follows:
1. Program AC mode, 3 phase, low voltage range, 120Vac, 50 or 60 Hz. Close output
relay.
2. Select the OUTPUT CAL screen.
3. Connect phase meter between phase A and B outputs.
4. Use the PHASE key to select phase B in the upper right corner of the CAL screen.
5. Close output relay and measure the phase angle between phase A and Phase B.
6. Adjust PHASE OFST cal coefficient up or down and press ENTER key until phase B
offset is 240° ± 0.5° or better.
7. Connect phase meter between phase A and C outputs.
8. Use PHASE key to select phase C in the upper right corner of the CAL screen.
9. Adjust PHASE OFST cal coefficient up or down and press ENTER key until phase C
offset is 120° ± 0.5° or better.
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6.4.8 Option -413 Calibration
If the IEC61000-4-13 auxiliary generator option is installed, the following calibration procedure
applies. Refer to for the locations of the adjustment pots on the Aux. Waveform Generator (CI
P/N 7004-719-1).
CAUTION:
This will require the top cover to be removed. Always use caution when
removing the top panel to not touch the LV supply. This procedure should
be performed by qualified personnel only
1. Select AC mode, 300V range, 0.0 Vac, 50 Hz. Do not apply a load. Close output relay.
2. Select INTER HARMONICS the MENU 2 screen. The following values will be displayed:
REF. VOLT = 0.0 VAC
VOLTAGE = 0.0%
INTER HARMONICS
FREQUENCY = 400 Hz
REF. COUPL = OFF
REFERENCE = OFF
3. Select REFERENCE and program ON with the shuttle.
4. Select REF VOLT and program 230.0.
5. Select VOLTAGE and program 8.7%.
6. Select FREQUENCY and program 400 Hz. This combination of values should generate a 20.0
Vac RMS output from the AUX. Generator. See sample below:
REF. VOLT = 230.0 VAC
VOLTAGE = 8.7%
INTER HARMONICS
FREQUENCY = 400 Hz
REF. COUPL = OFF
REFERENCE = ON
7. Adjust the respective pot for the output phase being calibrated for a 20.0 ± 1.0 volt output on the
external AC DVM.
PHASE
A
B
C
ADJUSTMENT POT
R9
R10
R11
8. Select FREQUENCY in the INTER HARMONIC screen and program the frequency to 1800 Hz.
9. Select the OUTPUT CALIBRATION screen.
10. Select the INTER HARM FS value.
11. Use the shuttle to calibrate the output voltage to 20.00 ± 1.0 volts rms.
12. Select REFERENCE and program OFF with the shuttle.
13. Open output relay. This completes the -413 option calibration.
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Top View
from back of MX
chassis
Interface Board
Shield
Detail
view
7003-719
IEC413
board
Adjustments
CPU/Phase A
AUX
Generator
R9 R10 R11
Figure 6-5: -413 Option Aux Generator Adjustments
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6.4.9 Output Calibration Summary
The following Table is a summary of the preceding calibration steps. Note that Series II MX
models have fewer calibration coefficients.
Program the following values in the table and make the adjustments in the OUTPUT
CALIBRATION screen. Select the phase to be calibrated by pressing the PHASE key.
CALIBRATION
PROGRAM VALUES
CALIBRATION VALUE
ADJUST TO
150 VAC range DC Zero
150 VAC range, 0.0 V
VOLT ZERO
0 ± 15 mv DC
150 VAC range Volt FS
120.0 V, 60 Hz
VOLT FS
120 ±0.05 VAC
150 VAC range Volt Hi Freq 120.0 V, 400 Hz
V HI FREQ
120 ± 0.05 VAC
Repeat the adjustments at 60 and 400 Hz until the output is within ± 0.05 volts
300 VAC range, 0.0 V, VOLT ZERO
0 ± 5 mV DC
60 Hz
240.0 V, 60 Hz
VOLT FS
240 ± 0.05 VAC
300 VAC range Volt Hi Freq 240.0 V, 400 Hz
VOLT HI FREQ
240 ± 0.05 VAC
Repeat the adjustments at 60 and 400 Hz until the output is within ± 0.05 volts
150 VDC range DC Zero
150 VDC range Volt +FS
200 VDC range, 0.0 V
+160.0 V
VOLT ZERO
VOLT FS
0 ± 5 mV DC
+160 ± 0.05 VDC
300 VDC range Volt
+320.0 V
VOLT ZERO
VOLT FS
0 ± 5 mV DC
+320 ± 0.05 VDC
Phase Offset B, C
150 VAC range, 120V,
60 Hz
400 Hz
1800 Hz
PHASE OFST
± 0.5°
R9, R10, R11
INTER HARM FS
20 ± 1.0 Vrms
20 ± 1.0 Vrms
Option -413
Table 6-3: Output Calibration Table – MX Series I
CALIBRATION
PROGRAM VALUES
CALIBRATION VALUE
ADJUST TO
VOLT ZERO
0 ± 5 mV DC
300 VAC range High Freq
DC Zero, -HF models only.
300 VAC range, 0.0 V,
60 Hz
300 VAC range, 0.0 V,
820 Hz
240.0 V, 60 Hz
VOLT ZERO
0 ± 5 mV DC
VOLT FS
240 ± 0.05 VAC
VOLT ZERO
0 ± 5 mV DC
Phase Offset B, C
150 VAC range, 120V,
60 Hz
400 Hz, 20VAC
1800 Hz, 20VAC
PHASE OFST
± 0.5°
R9, R10, R11
INTER HARM FS
20 ± 1.0 Vrms
20 ± 1.0 Vrms
Option -413
Table 6-4: Output Calibration Table – MX Series II
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6.5 Non-Routine Calibration
The non-routine calibration may involve removing the front or top cover of the power source.
Use extreme caution when performing any of these tasks while the system is connected to AC
mains and/or powered up.
6.5.1 Power Source Gain Adjustment
For any MX configuration that requires two or more amplifiers to be operated in parallel for
increased current output, the amplifier gains have to matched as closely as possible to ensure
equal current sharing. If an unbalance exists between amplifier outputs, one or the other
amplifier will deliver more current and may run into its current limit protection before full output
power can be attained.
This procedure details the gain adjustment. Generally, MX units are shipped with the gains
already set correctly so this task should only be undertaken if an amplifier has been replaced or
if two MX units are to be combined that were not originally shipped from the factory as such.
To make this adjustment the front cover must first be removed in order to get access to the
power module output terminals. If the power system to be adjusted is an MX45-1, the procedure
involves matching the output voltage of the B and C power modules to the A module. Proceed
as follows:
1. Verify the controller is indeed set for 1-phase operation.
2. Shut off all power to the cabinet. Disconnect the two wires going to Terminal 6 and Terminal
7 on the lower front of the power modules. Do this to module B and C only. Place some
temporary insulation over the lug ends.
3. Connect a DMM between terminals 6 and 7 on the A module. Power up the cabinet. Set the
controller to the 300V range, program 230V at 60Hz. Enable the output by pressing the
OUTPUT ON/OFF key.
4. Measure the A module output voltage and write it down. Press the OUTPUT ON/OFF key to
disable the output.
5. Move the DMM leads to the B module terminals 6 and 7. Press the OUTPUT ON/OFF key
again to enable the output. Verify the phase B module output is within 50mVolts of the A
module. If it is not, adjust the pot behind the hole in the upper left corner of the module so
the B output matches the A output within 50mVolts. Press the OUTPUT ON/OFF key to
disable the output.
6. Move the DMM leads to the C module terminals 6 and 7. Press the OUTPUT ON/OFF key
again to enable the output. Verify the phase C module output is within 50mVolts of the A
module. If it is not, adjust the pot behind the hole in the upper left corner of the module so
the C output matches the A output within 50mVolts.
7. Power down system and replace the wires to terminals 6 and 7 on the B and C modules.
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If the power system to be adjusted is an MX60, MX90 or an MX135, the procedure involves
matching the output voltage of the A, B and C power modules in the master cabinet to the A, B
and C power modules in the auxiliary cabinet(s). Proceed as follows:
1. Verify the controller is indeed set for 3-phase operation (MX60, MX90 or MX135).
2. Shut off all power to the cabinets. Disconnect the two wires going to Terminal 6 and
Terminal 7 on the lower front of the power modules. Do this to module A, B and C in the
auxiliary cabinet(s) only. Place some temporary insulation over the lug ends.
3. Connect a DMM between terminals 6 and 7 on the A module in the master cabinet. Power
up the cabinet. Set the controller to the 300V range, program 230V at 60Hz. Enable the
output by pressing the OUTPUT ON/OFF key. Measure the A module output voltage and
write it down. Press the OUTPUT ON/OFF key to disable the output.
4. Move DMM leads to the B module terminals 6 and 7. Press the OUTPUT ON/OFF key to
enable the output. Measure the B module output and write it down, Press the OUTPUT
ON/OFF key to disable the output.
5. Move DMM leads to the C module terminals 6 and 7. Press the OUTPUT ON/OFF key to
enable the output. Measure the C module output and write it down, Press the OUTPUT
ON/OFF key to disable the output.
6. Move the DMM leads to the A module terminals 6 and 7 in the auxiliary cabinet. Press the
OUTPUT ON/OFF key again to enable the output. Verify the phase A module output is
within 50mVolts of the A module in the master cabinet. If it is not, adjust the pot behind the
hole in the upper left corner of the module so the A output matches the A master output
within 50mVolts. Press the OUTPUT ON/OFF key to disable the output.
7. Move the DMM leads to the B module terminals 6 and 7 in the auxiliary cabinet. Press the
OUTPUT ON/OFF key again to enable the output. Verify the phase B module output is
within 50mVolts of the B module in the master cabinet. If it is not, adjust the pot behind the
hole in the upper left corner of the module so the B output matches the B master output
8. Move the DMM leads to the C module terminals 6 and 7 in the auxiliary cabinet. Press the
OUTPUT ON/OFF key again to enable the output. Verify the phase C module output is
within 50mVolts of the C module in the master cabinet. If it is not, adjust the pot behind the
hole in the upper left corner of the module so the C output matches the C master output
9. If power system under adjustment is an MX135, then repeat steps 6, 7 and 8 above for the
second auxiliary cabinet.
10. Power down system and replace the wires to terminals 6 and 7 on the auxiliary power
modules.
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6.5.2 Current Limit Calibration
Note:
This procedure only applies to MX Systems with top assembly P/N 7003-400-1
(Series I). If the MX system is P/N 7003-422, this section can be skipped. To
check the model top assembly part number, consult the model and serial tag on
the rear on the MX chassis.
Program the output to 135V, 60Hz on the low range. Program the current limit to IPROG in
Table 6-5 below, set limiting mode to Constant Current (CC).
Apply 105 to 110% of IPROG load to phase A output. Now adjust R195 on the system interface
board (P/N 7003-700-1) until the output current is 103% of IPROG (ISET).
When this adjustment is being made the front panel OVERLOAD indicator should be lit.
If system is 3-phase, then proceed to the phase B output and adjust R196 as above. For phase
C output adjust R197.
MODEL
MX30-1
MX30-1
MX45-1
MX45-3
MX90
MX135
IPROG
200
66
300
100
200
300
ISET
206
68
309
103
206
309
ADJUST
R195
R195, R196, R197
R195
R195, R196, R197
R195, R196, R197
R195, R196, R197
Table 6-5: Current Limit Calibration
Repeat this adjustment for the Phase B and Phase C if present.
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6.5.3 Output Impedance Calibration (MX30-3Pi / MX45-3Pi only)
For the output impedance calibration, two HP 34401A DMM's or equivalent must be used. The
following modes must be programmed: 6 digits, AC Filter, slow: 3 Hz and 6 digits. One DMM is
used to measure the output voltage, one to measure the load current using a suitable CT. The
calibration should be done for each phase individually. Furthermore, an accurate phase meter
with at least 0.01° resolution is needed. (See equipment list section 6.1). The reference input of
the phase meter must be connected to the LOCK output of the controller at the rear panel. This
is a square wave TTL signal. The input of the phase meter must be connected at the output of
the phase being calibrated. The phase meter is used to determine the phase shift between no
load and full load conditions (ΔΦ).
1. Program the power source to 230.0VAC and 50Hz. Turn off the ALC mode from the
UTILITY, VOLT/CURR CONTROL screen. The ALC must be off to use programmable
impedance.
2. Program the output impedance resistance and inductance to the lowest values from the
OUTPUT IMPEDANCE screen. This will be the IMP. REAL MIN and IMP. REACT MIN
values that have been set in the OUTPUT CAL screen. Press the PHASE key to select the
phase to be calibrated. (A, B or C).
3. Measure the output voltage of the power source with no load and record this value (VNL).
4. Using a resistive load bank, load the output of the power source to about 48 ± 9 amps.
Measure the output voltage of the power source under load and record this value (VL). Also
measure the load current and record this value. (I).
5. Calculate the resistive and inductive component R and L using the formulas shown in Table
6-7.
6. Enter these values, in the OUTPUT CAL screen for the IMP. REAL MIN and IMP. REACT
MIN value respectively. Make sure the correct phase is selected or use the PHASE key if
not.
7. Remove or turn off the load.
8. From the MENU 3 screen, select OUTPUT IMPEDANCE. Press the PHASE key to select
the phase to be calibrated. Program the output inductance to 200 uH and the resistance to
200 mOhms.
9. Select the Calibration, Output screen and move the cursor to the IMP REAL FS field.
Measure the R and L by removing and applying the load as described before and calculating
the R and L using the formulas in Table 6-6.
Adjust the resistive output impedance using the shuttle until the measured output is as close
as possible to 200 mOhm. Make sure the correct phase is selected or use the PHASE key if
not. Do the same with the IMP REACT FS field. Note that the adjustment range for R is 0 to
100, for L is 0 to 300.
10. Press SET to save the calibration coefficients for the selected PHASE.
11. If there is not enough range in the full-scale calibration coefficient for either resistive or
inductive portion, it may be necessary to tweak the adjustment pots on the MX controller.
These pots were originally adjusted at the factory and normally do not have to be adjusted
again. The Full Scale calibration coefficients should have enough adjustment range. Double
MX Series
180
check the connections and phase measurements if this is not the case to make sure the
measurement readings you get are indeed correct.
If it is necessary to adjust the pots, see Table 6-6 for the corresponding pot designators. The
top cover has to be removed to access these pots. They are located along the top edge of
the controller board(s). For Series I MX units, adjustments for phase A are on the phase A
board (7000-721), adjustments for phase B and C are on the phase B/C board (7000-722).
For Series II MX units, all adjustments are on the 7003-718 controller board. The reference
designators are the same on either series controller.
12. Repeat steps 2 through 11 for phase B and C. (except on single phase only models).
MX Series I
Phase / Board #
Phase A (7000-721)
Phase B (7000-722)
Phase C (7000-722)
MX Series II
Phase / Board #
Phase A (7003-718-2 / -4)
Phase B (7003-718-2)
Phase C (7003-718-2)
R resistive
Xl inductive
R121
R112
R114
R resistive
R122
R111
R115
Xl inductive
R121
R112
R114
R122
R111
R115
Table 6-6: Programmable Z adjustment pots
Definitions:
VNL = Measured RMS voltage under no load.
VL = Measured RMS voltage under load
I = Measured RMS current.
F = Source frequency (50 Hz).
ΔΦ= Phase angle shift between load and no load conditions. Record phase angle
from phase meter under NL and L condition and determine phase shift.
Formulas to calculate R and L component of output impedance:
R = ( VNL * cos(ΔΦ) - VL ) / I
XL = ( VNL * sin(ΔΦ)) / I
L = XL / (2 * Pi * F)
Table 6-7: Formulas to calculate R and L
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7. Service
7.1 Cleaning
The exterior of the power source may be cleaned with a cloth dampened with a mild detergent
and wrung out. Disconnect mains power to the source before cleaning. Do not spray water or
other cleaning agents directly on the power source.
7.2 General
This section describes the suggested maintenance and troubleshooting procedures. The
troubleshooting procedure is divided into two sections. The first section deals with basic
operation and connection of the equipment. The second section requires opening the unit and
using LED indicators and a simple multimeter to troubleshoot the unit down to the module level.
Only a qualified electronic technician should attempt this level troubleshooting.
7.3 Basic operation
PARAGRAPH
PROBLEM
0
7.3.2
7.3.3
7.3.4
7.3.5
7.3.6
7.3.7
Excessive Output Voltage
Poor Output Voltage Regulation
Overload Light On
Distorted Output
Unit Shuts Down After 1-2 Seconds
No Output and no lights on front panel
No output, but front panel controller is active.
Table 7-1: Basic Symptoms
7.3.1 Excessive Output Voltage
CAUSE
SOLUTION
External sense not connected (If used)
Connect external sense wires from TB2 on
rear panel to the AC power outlet TB1A
and TB1B
7.3.2 Poor Output Voltage Regulation
CAUSE
SOLUTION
Unit is overloaded
Unit is programmed to wrong voltage
range.
Input line has fallen below spec. limit.
Remove overload
Select correct voltage range.
MX Series
Check input supply voltage.
182
7.3.3 Overload Light is On
CAUSE
SOLUTION
Unit is overloaded
Unit is switched to high voltage range.
Remove overload or check CL setting
Select correct voltage range.
7.3.4 Distorted Output
CAUSE
SOLUTION
Power source is grossly overloaded.
The crest factor of the load exceeds 3:1 on
the low range or 5:1 on the high range.
Reduce load
Reduce load current peaks by reducing
load.
7.3.5 Unit Shuts Down after 1-2 Seconds
CAUSE
SOLUTION
Output shorted
Output grossly overloaded.
PFC IGBT module failure
Operating load with too high inrush or start
up currents.
Remove output short
Remove overload.
Have power module serviced
Consult factory for application advice.
7.3.6 No Output and No Lights on Front Panel
CAUSE
SOLUTION
Input circuit breaker switched off.
No input power to F1, F2 and F3.
Switch the breaker on.
Ensure 3 phase power is getting to input
fuses.
Have LV supply serviced.
LV Power Supply failure
7.3.7 No Output But Front Panel controller is active
CAUSE
SOLUTION
“OUTPUT ON” button is turned off.
Press OUTPUT ON so that “ON” LED is
lit.
Check polarity setting or RI Mode. Use
OUTPut:RI[:LEVel] LOW/HIGH command
to set RI mode to high or low.
Program current limit higher.
Turn amplitude control up.
REMOTE INHIBIT pins 5 & 6 at TB3 on
rear panel are shorted together.
Current limit programmed down or to zero.
Voltage programmed down or to zero.
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7.4 Advanced Troubleshooting.
WARNING:
Do not connect 400-480V into the 208-240V unit, the result could
be a severely damaged unit.
CAUTION:
VOLTAGES UP TO 480 VAC AND 450 VDC ARE PRESENT IN
CERTAIN SECTIONS OF THIS POWER SOURCE.
WARNING:
THIS EQUIPMENT GENERATES POTENTIALLY LETHAL
VOLTAGES. DEATH ON CONTACT MAY RESULT IF PERSONNEL FAIL TO
OBSERVE SAFETY PRECAUTIONS. DO NOT TOUCH ELECTRONIC CIRCUITS
WHEN POWER IS APPLIED
7.4.1 Switch Off Unit
Switch off the unit at the circuit breaker on the front panel as well as removing the input power
from the unit.
WARNING:
Wait 10 minutes for all internal capacitors to discharge.
7.4.2 Removing Covers
Remove the screws securing the front cover and remove it.
Remove the screws securing the top cover and remove it.
7.4.3 Initial Inspection
Make a visual inspection of the unit and ensure all the connectors are properly mated and there
are no loose wires.
7.4.4 Fuse Check
Using an ohmmeter, check input fuses F1, F2 and F3 for continuity.
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7.4.5 Power-on Troubleshooting Using the LED’s.
WARNING:
Do not touch any parts inside the unit during this test as they will
be live and dangerous. Always wear safety glasses.
If the three input fuses are OK, then reconnect the main AC input power to the cabinet.
LV Supply (CI P/N 7003-702):
Turn the main breaker on and check green LED DS2 and DS3 on the system interface board.
Both LEDs should be lit indicating the +/-19Vdc and +/-15Vdc supplies are OK.
If one or both of the LEDs is not lit, then there is something wrong with the LV power supply and
it will have to be serviced.
Oscillator (Front Panel):
If LV supply appears good, then program 150Vac on the low range and connect a DMM to TP2
(phase A) on the system interface board with the low side of the meter connected to TP1. There
should be a 2 – 3 volt rms signal present on TP2. Check TP3 (phase B) for the same signal.
Check TP4 (phase C) for the same signal.
AC power module (CI P/N 7003-402-1):
If the oscillator drive signals are present on the system interface board, connect the DMM to
brass terminals 5 & 6 located near the bottom of the power module. Program 100 Volts.
There should be about 100Vac between terminals 5 and 6. If no voltage at all is measured it is
possible that the AC power stage inside the module has failed and it will be necessary to remove
the power module from the chassis for closer inspection.
WARNING:
Wait 10 minutes for all internal capacitors to discharge.
To remove the power module proceed as follows:
1. Disconnect the 7 wires going to the brass terminals on the lower front panel of the module.
Label the wires so they can be reinstalled correctly later.
2. Remove screws securing the upper and lower straps holding the module in the chassis slot.
3. Remove the 50-pin ribbon connector at J50A, B or C.
4. Carefully slide module outward and lift out of cabinet. Use caution, module weighs 66 LBS
(30Kg).
5. With the power module out of the cabinet and lying flat on a bench, remove the screws on
the bottom and sides of the left hand cover as seen from the front when module is installed
normally.
6. Inspect the three IGBT transistor modules Q1, Q2 and Q3 for any visible damage.
7. Using an ohmmeter check the 30A fuses on the positive and negative side of the power
distribution board that connects the four amplifier modules to the DC bus. If any of them are
open, then one or more of the amplifier sections has a damaged device on the heat sink
assemblies and the power module assembly will have to be serviced.
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7.4.6 Other No Output Conditions
If one or more outputs (phase A, B or C) do not produce an output, it may be caused by an
amplifier failure. Amplifier failures can either be input (PFC) or output related (Amp). To
determine if this is the case, the cover of the amplifier has to be removed. Contact customer
service [email protected] before attempting to diagnose on your own.
PFC failure denotes one or all three of the IGBT power modules on the large PFC heat sink
have shorted, and damaged the devices. This type of failure is sometimes accompanied by a
popping sound as the large PFC power devices give out. To diagnose this failure mode, the
amplifiers must be removed and the cover removed for inspection.
If there is any sign of damage, the PFC power devices must be replaced. If not, they need to be
checked for continuity using a DMM or diode checker.
In case of a PFC failure, older generation PFC control boards (7003-705 or 7003-712) may have
sustained damaged in the isolated gate drive section of the board and the board itself may have
to be replaced. MX Systems with later generation 7003-716 PFC control boards generally will
only require replacement of the 2A gate fuses to restore functionality.
If the PFC section looks intact, one of the output amplifier switches may have shorted.
The usual scenario is one or two of the IGBT switch devices on one of the 4 heat sinks get
shorted. Usually if the B+ device is failed, the B- device will also short. When these devices
short, one or more of the 30A fuses (F1 through F8) on the DC power distribution board will be
open.
An amplifier device failure is not audible at all so there may be no indication of this other than
checking as follows:
1. Measure the output voltage with Zero AC volts programmed.
2. Remove any EUT from the output connections.
3. Turn output ON and measure the AC and DC output. It should be close to zero.
4. If the output reads –225VDC on the low range and close to 0 Vdc on the high range, then it
is almost certain that the fuse is blown and 1 or 2 IGBT devices are shorted.
Note that the measurement screen will not report the DC faulty output voltage in the AC mode,
as the measurements in this mode are AC coupled. Therefore, it is necessary to measure at the
output terminals with a DMM to determine the actual output. Alternatively, the MX45 can be
switched to AC+DC mode in which case the internal measurements can be used instead.
If it is determined that it is an amplifier failure, the affected IGBT's need to be replaced. If no
local service support is available, the amplifier may be exchanged completely. Contact customer
service [email protected] for module exchange information.
7.5 Factory Assistance
If the problem with the cabinet or one of the power modules cannot be isolated, contact the
factory for assistance.
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186
7.6 Fuses
FUSE #
F1, F2, F3
F1, F2, F3
F1
F1 – F8
FUNCTION
FUSE VALUE
CI #
200A
110A
100A
30A
270246
270226
270249
270168
AC mains input, 208 - 240V.
AC mains input, 400 - 480V
Power Module PFC Fuse
AMP Heat Sink Fuses
Table 7-2: MX Fuse Ratings
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7.7 Firmware Updates
All MX Series units shipped with firmware revision 1.00 or higher support firmware updates over
the RS232C interface. If your unit came with a firmware revision less than 1.00 (0.XX), contact
customer service at [email protected] for information on firmware upgrades. (Refer to
Service Bulletin SB-0043 for required controller modifications to support firmware updates over
the RS232 interface.
Units that support firmware updates over the RS232 interface will have a longer initial delay at
power up. This additional time delay at power-up allows the firmware erase and upload process
to be engaged if needed.
7.7.1 Requirements
This section provides basic instructions for updating firmware on MX series AC power sources.
The following items are required to download new firmware:
•
A copy of the new firmware in HEX format. Typically named “cic637rn.nn.hex” where
“n.nn” represents the revision of the firmware. The file may be downloaded from the
AMETEK Programmable Power website (www.programmablepower.com) or may have
been distributed through email. If the file is archived to a zip, it must be unzipped to its
original HEX format (.hex extension) before it can be used.
•
The FlashLoaderComm utility program. This Windows program can be downloaded from
the AMETEK Programmable Power website (www.programmablepower.com) under
GUI/Software. You need to be a registered user to do so.
•
A Windows 2000/XP PC with available RS232 serial port (COM port).
•
A RS2321 serial cable, CI P/N 7000-263-2. This cable is provided in the MX Series ship
kit. If lost, refer to the MX Series programming manual (PN 7003-961) for cable pin-out
information or contact customer service ([email protected]) to order a
replacement.
7.7.2 Download Instructions
Copy both FlashLoaderComm.exe and cic637rn.nn.hex files to a temporary folder on your PC. If
the FlashLoaderComm.exe was downloaded from the CI web site, it will have to be installed.
This is a self-extracting program installation. Just double click on the exe file to perform the
installation and follow the user prompts.
Cic637rn.nn.exe is the hex file that contains the firmware update. The n.nn will be the revision
number of the firmware. The hex file may be distributed as a WinZip archive with a .zip
extension. In that case, unzip the .zip file to its native .hex format before attempting to upgrade
the MX unit.
Please record the revision of the previous firmware before the update for reference. The
firmware revision is displayed during power up sequence of the MX AC source.
Connect the 7000-263-2 RS232 cable (9 pin to 9 pin) between the power source and an
available COM port of the PC.
1
The GPIB interface cannot be used for this purpose, as the Flash boot loader is a small resident
program that does not support GPIB communications.
MX Series
188
Power up the AC source using its on/off switch. A message will appear on the LCD once the
power comes on:
Please wait…
After about 30 seconds, this message changes to:
Loading Program…
When this “Loading Program…” message appears on the LCD of the MX front panel, press the
ENTER key on the keypad of the MX unit once. If you wait too long, you may have missed the
window and you will have to recycle power on the AC source and try again.
This will put the source controller into the Flash down load mode. Wait until the screen shown
below appears. This screen shows the RS232 setup parameters that are used in the boot loader
mode.
Firmware Down Load Mode
User Entry
Serial Port Setup
Baud 38400,Bits 8,Stop 1,No Parity
Now launch the Flash Loader utility program “FlashLoaderComm.exe”.
Select the COM port to be used (default is COM1). Leave “Baud rate” and “Cmd Delay” set to
their default values of 38400 baud and 0 msec.
MX Series
189
Click on the “Init Port” button. If the selected port can be initialized, the “Flash Update” button will
be enabled. If not, check the selected COM port and make sure it is the one connected to the
MX.
Press the “Flash Update” button. This will display the file download screen shown below.
Select Browse and locate the file Cic637rn.nn.hex at the location on the PC where you stored it
before.
Click on the “Download” button. This will start the firmware update procedure. The front panel
display for the AC source will display the message “Erasing Flash” first, followed by “Flash
erase complete” and “Programming Flash”. The down load will be completed in about 5 to 10
minutes depending on the size of the .hex file.
After the download completes successfully, the power source will initialize with the new
firmware. Observe the LCD display for the firmware revision displayed during initialization to
confirm the new firmware is now installed.
7.7.3 Flash down load Messages
One or more messages may appear during this process. The table below shows some of the
possible message and their meaning.
Message
Description
Remedy
Flash erase complete
Erase operation successful.
Flash erase fail
Firmware download capability not
supported by CPU board..
Refer to Service Bulletin SB0043
Flash write fail
Unable to write to flash. This
message is unlikely as it generally
is preceded by the Flash Erase
Fail message.
Refer to Service Bulletin SB0043
Firmware down load fail
Data error. Incorrect checksum
read-back from Flash block.
Communication interrupted or
problem with RS232 interface.
1. Check cable connection.
2. Try setting CmdDelay in Flash
loader program to 100 msec and
try again.
Table 7-3: Flash Down load Messages
MX Series
190
8. Top Assembly Replaceable Parts
Note that different generation MX units may use different sub assemblies. Check the serial tag on the
back of the MX to determine the applicable top assembly number to determine the correct sub assembly
or part required. For amplifiers, refer to the amplifier serial tag for the relevant amplifier top assembly
part number.
Ref.
CI P/N
A2
7003-421-1
7003-718-2
Description
Vendor
Qty
Location
Top Assembly 7003-427 / 7003-422
7000-723-4
Front Panel Assy. Prog. Osc.
CPU board assy. All 3 phase
MX.
CPU board assy. MX30-1,
MX45-1 only.
Keyboard/Display assy.
A2
7003-401-1
5100-707-2
7000-722-2
7000-723-1
Front Panel Assy. Prog. Osc.
CPU / Phase A board assy.
Phase B/C board assy.
Keyboard/Display assy.
A1
A1
7003-721-1
7003-721-2
A6
7003-722-1
7003-723-1
PC Assy. RS232 / GPIB / USB
PC Assy. RS232 / GPIB / USB /
LAN
PC Assy., Low Volt PSU
Ripple Filter
A1
A1
A6
7003-703-1
7003-703-2
7003-702-1
PC Assy. RS232 / GPIB
PC Assy. RS232 / GPIB
PC Assy., Low Volt PSU
A2
A3
A4
A14
A10
A7
A8
A9
B1
7003-408-1
7003-715-1
7003-701-1
7003-713-1
7003-714-1
7003-418-1
7003-418-1
7003-418-1
241186
Front Panel Assy., Auxiliary
PC Assy., System Interface
PC Assy., V / I Sense
PC Assy., PWR Interconnect
PC Assy., EMI Filter
Amplifier Assy., 15kVA
Fan, 3", 24VDC
CB1
270224
Circuit Breaker, 2.5A, 300V
K1
245235
Relay, 3C, 30A, 24VDC
K8
245235
K2
245236
K6
245236
K7
245236
K9
245236
7003-718-4
AMETEK PP
AMETEK PP
1
1
AMETEK PP
1
AMETEK PP
1
Top Assembly 7003-400
AMETEK PP
AMETEK PP
AMETEK PP
AMETEK PP
1
1
1
1
Top Assembly 7003-427
AMETEK PP
AMETEK PP
1
1
AMETEK PP
AMETEK PP
1
1
Top Assembly 7003-422 / 7003-400
AMETEK PP
AMETEK PP
AMETEK PP
1
1
1
Top Assembly 7003-427 / 7003-422 / 7003-400
MX Series
AMETEK PP
AMETEK PP
AMETEK PP
AMETEK PP
AMETEK PP
AMETEK PP
AMETEK PP
AMETEK PP
NMB Technology
3110KLO5WB50-P00
AIRPAX
IELH111-1-61-2-50-D-01-V
Deltrol Controls
21014 - 82
Deltrol Controls
21014 - 82
EE Controls
EECLS47.22NTW
EE Controls
EECLS47.22NTW
EE Controls
EECLS47.22NTW
EE Controls
EECLS47.22NTW
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
191
Ref.
CI P/N
Description
Vendor
K3
245237
K5
245237
K4
245237
EE Controls
EECLS57.22NTW
EE Controls
EECLS57.22NTW
EE Controls
EECLS57.22NTW
Ref.
CI P/N
Description
A1
Q1
Q2
Q3
Q4
7003-704-1
330436
330436
330436
330436
PC Assy., Modulator
Transistor, IGBT
Transistor, IGBT
Transistor, IGBT
Transistor, IGBT
A1
A1
Q1
Q2
Q3
Q4
7003-720-1
7003-724-1
330450
330450
330450
330450
PC Assy., Modulator (-1)
Transistor, FET
Transistor, FET
Transistor, FET
Transistor, FET
A3
A4
A5
A6
A7
A8
A8
A8
B1
B2
7003-405-1
7003-405-1
7003-707-1
7003-707-2
7003-716-1
7003-708-1
7003-717-1
7003-725-1
241183
241183
Heat sink Assy. Amplifier
Heat sink Assy. Amplifier
PC Assy., Output Filter
PC Assy., PFC
PC Assy., Fan Control
PC Assy., Snubber. (-1)
PC Assy., Snubber. (-2)
FAN, 6"
FAN, 6"
A1
A5
A6
Q1
Q2
Q3
Q4
7003-727-1
7003-727-5
7003-726-1
7003-726-2
330450
330450
330450
330450
PC Assy., Modulator (-5) –SNK
Transistor, FET
Transistor, FET
Transistor, FET
Transistor, FET
CR13
CR14
CR15
CR16
310387
310387
310387
310387
Q1
Q2
Q3
330437
330437
330437
Qty
Location
1
1
1
Qty
Location
1
4
4
4
4
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
1
1
4
4
4
4
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
1
1
1
1
1
1
1
1
1
1
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
AMETEK PP
AMETEK PP
AMETEK PP
AMETEK PP
INFINEON, IPW60R045CPXK
1
1
1
1
4
4
4
4
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
A7, A8, A9
Diode, FRcy, 30A, 1000V
APT, APT30D100B
APT, APT30D100B
APT, APT30D100B
APT, APT30D100B
1
1
1
1
Transistor, IGBT
Transistor, IGBT
Transistor, IGBT
FUJI, 2MBI150NC-060
FUJI, 2MBI150NC-060
FUJI, 2MBI150NC-060
1
1
1
Vendor
Amplifier Assy. 15kVA 7003-418-1
AMETEK PP
IXYS, IXGX60N60C2D1
IXYS, IXGX60N60C2D1
IXYS, IXGX60N60C2D1
IXYS, IXGX60N60C2D1
Amplifier Assy. 15kVA 7003-425-1 / 7003-425-2
AMETEK PP
AMETEK PP
Amplifier Assy. 15kVA - 7003-418-1 / 7003-425-1 / 7003-425-2
AMETEK PP
AMETEK PP
AMETEK PP
AMETEK PP
AMETEK PP
AMETEK PP
AMETEK PP
AMETEK PP
ROTRON JQ24B2
ROTRON JQ24B2
Amplifier Assy. 15kVA 7003-433-2 / 7003-433-5
MX Series
A7-PFC
A8-PFC
A9-PFC
192
Table 8-1: Replaceable Parts
Seq #
CI P/N
Description
F1
270246
FUSE, 200A, 600V
F2
270246
FUSE, 200A, 600V
F3
270246
FUSE, 200A, 600V
F1
270226
FUSE, 110A, 600V
F2
270226
FUSE, 110A, 600V
F3
270226
FUSE, 110A, 600V
F1
F1-F8
270249
270168
FUSE, 100A, 500V
FUSE, 30A, 600V
F1
F2
F3
270192
270192
270189
FUSE, Poly switch
FUSE, Poly switch
FUSE, Poly switch
F1
F2
270192
270192
FUSE, Poly switch
FUSE, Poly switch
F1
F1
F1
F2
F2
F2
270183
270183
270183
270192
270192
270192
FUSE, 3A, 250V
FUSE, 3A, 250V
FUSE, 3A, 250V
FUSE, Poly switch
FUSE, Poly switch
FUSE, Poly switch
Qty
Vendor
Assy. Number and Location
Top Assembly 7003-400-01
Ferraz Shawmut A6T200
Littlefuse JLLS 200
Littlefuse JLLS 200
Littlefuse JLLS 200
Littlefuse JLLS 110
Littlefuse JLLS 110
Littlefuse JLLS 110
1
1
For 208V / 230V Input
1
1
1
For 400V / 480V Input
1
Amplifier Assy. 15kVA 7003-418-1 / 7003-425-1 / 7003-433-2
Ferraz Shawmut A50QS100-4
Bussmann KTK-30
Littlefuse KLK-30
3
24
A7, A8, A9
A7, A8, A9
7003-713-1
Low Voltage Power Supply 7003-722-1
Raychem RUE250
Raychem RUE250
Raychem RXEF110
1
1
1
A6
A6
A6
Low Voltage Power Supply 7003-702-1
Raychem RUE250
Raychem RUE250
1
1
A6
A6
1
1
1
1
1
1
A7-A8
A8-A8
A9-A8
A7-A8
A8-A8
A9-A8
Fan Control 7003-708-1
Bussmann
Bussmann
Bussmann
Raychem
Raychem
Raychem
PCC3
PCC3
PCC3
RUE250
RUE250
RUE250
Table 8-2: Fuses
MX Series
193
9. Options
9.1 Introduction
There are a number of options available for the MX Series, both hardware and software. While
not all or no options may be present on your specific unit, this section of the manual incorporates
the user documentation for all available options. There is no separate manual for these options
except possible manual addenda for specials engineering request (SER) systems. If your
system has an SER number as part of the model number, refer to any manual addendum that
was shipped with the unit.
MX Series
194
9.2 Option -HV: Additional AC Voltage Range
The -HV option provides an additional AC only output voltage range of 0-400 VRMS. There is
no equivalent 200 VRMS range associated with the -HV option but the standard 0-150 V RMS
and 0-300 V RMS remain available even if the -HV option is installed.
If the -HV option is installed, there will be three voltage ranges that can be selected from the
PROGAM 1 menu. (150/300/400). Other than the range values, all other operations remain the
same. Note however that the -HV range is AC coupled and as such offers no DC output
capability. Thus, whenever the 400 V range is selected, the output mode is automatically set to
AC MODE and other modes cannot be selected.
Since the –HV option range is AC coupled, the lower frequency limit on the –HV range is 45 Hz
and not the 16 Hz that applies to the standard 150/300V ranges. The upper frequency limit
remains the same.
Arbitrary waveforms
As stated before, the –HV (and –XV) range is AC (transformer) coupled and as such cannot
pass any DC component from the waveform generator. This means that any arbitrary waveform
created by the user that is to be used in the –HV range cannot have any DC offset. The MX
firmware will generate an error message is an attempt is made to select a custom waveform with
DC offset while in the –HV range.
MX Series
195
9.3 Option –160: RTCA/DO-160 Tests
The RTCA/DO-160 Option is made up of both firmware that resides in the power source and the
MXGui Windows application program. The firmware covers revision D and can be used from
the front panel or under MXGui control. Revision E is implemented through the MXGui only.
The user interface for each implementation is different. The revision D tests can be operated
directly from the power source’s front panel or through the supplied MXGui program. The
Revision E tests can only be operated through the MXGui windows software. Thus, for Rev E
use, a Windows PC and interface – RS232 ,USB, LAN or GPIB (recommend) - is required.
Section 9.3.1 covers operation of the firmware based revision D tests.
For information regarding the operation of the DO160 revision E tests with the MXGui, please
refer to the Avionics Software Manual (CI part no. 4994-971 included on CDROM). Note that
future updates of the MXGui may include overlapping coverage for revision D in the software as
the MXGui program is designed to support all revisions. For now, revision D has no associated
data files in the MXGui but does have it’s own user interface control screen.
9.3.1 Option –160: RTCA/DO160 rev D Tests (Firmware)
9.3.1.1 General
The RTCA/DO-160 option is capable of performing all sections of RTCA/DO-160D, Section 16
and EUROCAE-14D / RTCA DO160D, Section 16 for the AC Source signal. A selection is made
available to specify the type of standard, and groups.
Through out this document, Groups 1 through 3 will be used to refer to EUROCAE-14D
standard.
9.3.1.2 Initial Setup
Nominal parameters for the AC Power source are as follows:
Output Voltage
115V L-N or 230V L-N
Output Frequency
360 Hz to 800 Hz
Nominal parameters for the DC Power source are as follows:
Output Voltage
28V or 14V L-N
A setting outside these nominal values will disable the test and will prevent accessing to its
Menu screens. To access the test for the 230V L-N, the power source must be capable of
programming 360V.
9.3.1.3 Tests Performed
Available tests are divided into Normal, Abnormal and Emergency.
9.3.1.3.1 NORMAL STATE
AC Source:
1. Normal State Voltage and Frequency test
2. Voltage unbalance test
3. Waveform Distortion test
4. Voltage Modulation test
MX Series
196
5. Frequency Modulation test
6. Momentary Power Interrupt (Undervoltage) test
7. Voltage Surge (Overvoltage) test
8. Frequency Transients test(Group 1 only)
Frequency Variation test (Group 2 and 3 only)
DC Source:
1. Normal State Voltage test
2. Momentary Power Interrupt (Undervoltage) test
3. Voltage Surge and Under
9.3.1.3.2 EMERGENCY TEST
AC Source:
1. Emergency Voltage and Frequency minimum
2. Emergency Voltage and Frequency maximum
3. Voltage unbalance
DC Source:
1. Emergency Voltage
9.3.1.3.3 ABNORMAL TEST
AC Source:
1. Abnormal Voltage minimum
2. Abnormal Voltage maximum
3. Voltage Drop
4. Voltage Surge
5. Frequency Transients test (group 1 only)
DC Source:
1. Abnormal Voltage minimum
2. Abnormal Voltage maximum
3. Abnormal Voltage low
4. Voltage Drop
5. Voltage Surge
9.3.1.4 Front Panel Entry
To perform a test from the keyboard, from the MENU 2 screen, select the APPLICATIONS
screen. The APPLICATIONS screen will appear as shown in Figure 9-1.
Figure 9-1: Application Menu
MX Series
197
Scroll to the RTCA/DO-160D entry using the up and down cursor keys. Press the ENTER key to
select the RTCA/DO 160D main menu. The screen will appear as shown in Figure 9-2.
Note: The user has to turn on the Output relay before starting a test.
Figure 9-2: DO160 Main Menu
9.3.1.5 AC TESTS
Note: Prior to test selection the standard and the group selection are required. Use the shuttle to
select the standard and the group if applicable.
9.3.1.5.1 Normal state test
Scroll to the NORMAL STATE AC entry using the up and down cursor keys. Press the ENTER
key to select the NORMAL STATE screens. The screen will appear as shown in Figure 9-3.
Figure 9-3: Normal State
The DO160 NORMAL 1 and NORMAL 2 screens have the following tests:
1
VOLT FREQ MIN
2
VOLT FREQ MAX
3
VOLT UNBALANCE
4
WAVEFORM DISTORTION
5
VOLT MODULATION
6
FREQ MODULATION
7
POWER INTERRUPT
8
VOLTAGE SURGE
9
FREQ TRANSIENT (group 1)
FREQ VARIATION (group 2 & 3)
The above tests can be selected by scrolling to the highlighted selection using the up and down
key and the ENTER key to start the selected test. For some of these tests, numeric data entry
may be required to define the test number or the modulation rate.
VOLT FREQ MIN
Standard/Group
Voltage
MX Series
1
RTCA
100
Group1
104
Group2
104
Group3
104
198
3
101.5
380
Frequency
105.5
390
105.5
360
105.5
360
Group2
122
120.5
650
Group3
122
120.5
800
Table 9-1: Normal Voltage and Frequency Minimum
Standard/Group
Voltage
RTCA
122
120.5
420
1
3
Frequency
Group1
122
120.5
410
Table 9-2: Normal Voltage and Frequency Maximum
This test will set the voltage and frequency to levels defined by Table 9-1. The test will last for 30
minutes. The test will be repeated for the Group 2 and 3 using the Voltage setting from Table 9-2
and the frequency from Table 9-1. The ← key (backspace) will terminate the test at any time.
VOLT FREQ MAX
This test will set the voltage and frequency to levels defined by Table 9-2. The test will last for 30
minutes. The test will be repeated for the EURO standard using the Voltage setting from
Table 9-1 and the frequency from Table 9-2. The CLR Key in local operation will terminate the test
at any time. Group execute trigger will terminate the test remotely. The unselected phases will
remain at 115 volts. The ← key (backspace) will terminate the test at any time.
VOLT UNBALANCE
Standard/Group
Voltage offset
Frequency
RTCA
6
400
Group1
6
400
Group2
6
360/650
Group3
9
360/800
Table 9-3: Normal Voltage Unbalance
This test will change the output voltage for each phase from 115 volts to 115V + offset. Refer to
Table 9-3 for the offset value and the Frequency. The test will last 30 minutes. The test will be
repeated for a second Frequency if applicable. The test can be terminated at any time.
The ← key will terminate the test at any time.
WAVEFORM DISTORTION
This test will generate a 5% THD voltage distortion on the output voltage waveform. The
distortion is generated by using a clipped sine wave. The test will last for 30 minutes. The ←
key (backspace) will terminate the test at any time.
VOLTAGE MODULATION
This test requires a numeric value entry equal to the modulation rate in Hz. This entry value
must be between 1 Hz and 200 Hz. The amplitude modulation is calculated based on the
modulation rate as defined in Figure 9-4. This test will last for 2 minutes.
MX Series
199
Figure 9-4: Voltage Modulation
MX Series
200
FREQUENCY MODULATION
This test requires a numeric value equal to the modulation rate in Hz. This value must be
between 0.01 Hz and 100 Hz. The frequency modulation is calculated based on the modulation
rate as defined in Figure 9-5. This test will last for a minimum of 2 minutes.
Figure 9-5: Frequency Modulation
MX Series
201
POWER INTERRUPT
This test requires a numeric entry value equal to the test number. The tests are grouped as follows:
• Test numbers 1 through 15 are for all Standard and Groups. See Figure 9-6 for details of the tests.
•
•
Test numbers 16 and 17 for all equipment that does not incorporate digital circuit. Test number 16 will
drop the output to zero voltage for 50 ms. Test number 17 will drop the output to zero voltage for 200
ms. Test number 18 is used for DC equipment and will drop the output for 1 sec.
Test numbers 21 through 26 are applicable for Groups 2 and 3 only. Output frequency will be set to the
F1 value for 1 second prior to the test. The output frequency will remain set to the F2 value when the
test is completed. This will allow the user to apply sequence of power interrupts. See Figure 9-7 for
detail of the tests.
T1
V (NOM)
% of V NOMINAL
(V MIN)
0 VOLTS
T2
T3
DO160 Table 16-1: Test conditions for equipment with digital circuits.
NOTES
1: Definitions:
T1
Power interrupt time
T2
Time it would take for the applied voltage to decay from V (nom) to zero volts.
T3
Time it would take for the applied voltage to rise from zero to V (nom) volts.
V MIN The minimum level (expressed as a percentage of V NOMINAL) to which the applied
voltage is permitted to decay.
2:
Tolerance to T1, T2, T3 = ± 10%
3:
Test condition numbers 8 and 15 are for category Z, dc powered equipment only.
Applicable
Category:
A
A, Z
Z
A, B, Z
A, Z
Z
Test
Condition
No.
1**
2
3
4
5
6
7
8
9
10
11
12
13
14
15
T1 (ms)
2**
10
25
50
75
100
200
1000
10
25
50
75
100
200
1000
T2 (ms)
<1
20*
20
20
20
20
20
20
50*
50*
50
50
50
50
50
T3 (ms)
<1
5
5
5
5
5
5
5
20
20
20
20
20
20
20
0
50
15
10
5
0
0
0
80
50
0
15
5
0
0
%V Nom.
(V min)
*
Voltage will not reach zero in this test condition.
** Equipment performance standards may require to repeat test n°1 with T1 varying from 5 to 200 ms by step
defined in the test equipment performance standards (step typically comprised between 5 ms and 20 ms depending
on equipment design.
Figure 9-6: Power Interrupt
MX Series
202
T1
0 Volt
F1
F2
T2
Test no.
T1 (ms)
F1 (Hz)
F2 (Hz)
T3
21(I)
50
360
Fmax
22(II)
50
Fmax
360
23(III)
100
360
Fmax
24(IV)
100
Fmax
360
25(V)
200
360
Fmax
26(VI)
200
Fmax
360
Fmax = 650 Hz for Group 2
Fmax = 800 Hz for Group 3
T2 = 20 msec
T3 = 5 msec
Figure 9-7: Power Interrupt for Group 2 and 3
VOLTAGE SURGE
This test requires 160 volt output voltage. If the power source is set at the low voltage range,
the high voltage range will be selected before the test starts. At the end of the test, the power
source will be switched back to the low range automatically
Voltage
Seq. No.
1
2
3
4
5
RTCA
115
160
115
60
115
Group 1
115
160
115
70
115
Group 2
115
160
115
70
115
Group 3
115
170
115
70
115
Time
ALL
5 Minute
30msec
5 Sec.
30msec
5 Sec.
Table 9-4: Normal VoltageSurge Sequence
The output voltage will follow the sequence in Table 9-4. The above sequence will repeat itself
three times. Each repeat will start from sequence two. US and Group 1 will run at 400 Hz.
Group 2 and Group 3 will run at 360 Hz and 650 Hz for Group 2 and 800 Hz for Group 3. The
frequency will return to the nominal setting when the test is completed. The ← key (backspace)
will terminate the test at any time.
MX Series
203
FREQUENCY TRANSIENTS (Group 1 only)
Seq. No
1
2
3
4
5
Frequency
400
440
400
350
400
Time
5 Minute
150msec
5Sec.
150msec
5Sec.
Table 9-5: Normal Frequency Transient Sequence
This test applies to Group 1 only. At 115 voltage, change the frequency per sequence listed in
Table 9-5. The test will cycle 5 times starting from sequence 2.
FREQUENCY VARIATION (Group 2 and 3 only)
Seq. No
1
2
3
Initial Frequency
Group2 Group3
360
360
650
800
360
360
Slew rate
Hz/Sec
100
100
Pause 5 sec
Final Frequency
Group2 Group3
650
800
360
360
360
360
Table 9-6: Normal Frequency Variation Sequence
This test will apply to Group 2 and 3 only. At 115 voltage, the frequency is set to 360Hz for 5
minutes. The frequency is slowed per sequence listed in Table 9-6. The test will cycle 3 times.
The frequency will return to nominal after the test is completed.
From the DO160 MENU scroll to the EMERGENCY AC entry using the up and down cursor
keys. Press the ENTER key to select the EMERGENCY screens. The screen will appear as
shown in Figure 9-8.
Figure 9-8: Emergency Screen
The EMERGENCY SCREEN has the following tests:
1
VOLT FREQ MIN
2
VOLT FREQ MAX
3
VOLT UNBALANCE
key and the ENTER key to start the selected test.
MX Series
204
VOLT FREQ MIN
Standard/Group
Voltage
RTCA
100
101.5
360
1Ф
3Ф
Frequency
Group1
104
105.5
360
Group2
104
105.5
360
Group3
104
105.5
360
Table 9-7: Emergency Voltage and Frequency Minimum
Standard/Group
Voltage
RTCA
122
120.5
440
1Ф
3Ф
Frequency
Group1
122
120.5
440
Group2
122
120.5
650
Group3
122
120.5
800
Table 9-8: Emergency Voltage and Frequency Maximum
This test will set the voltage and frequency for a level defined by Table 9-7. The test will last for
30 minutes. The test will be repeated using the voltage from Table 9-8 and frequency from
Table 9-7. The ← key (backspace) will terminate the test at any time.
VOLT FREQ MAX
This test will set the voltage and frequency for a level defined by Table 9-8. The test will last for
30 minutes. The test will be repeated using the voltage from Table 9-7 and frequency from
Table 9-8. The ← key (backspace) will terminate the test at any time.
VOLT UNBALANCE
Standard/Group
Voltage offset
Frequency
RTCA
8
400
Group1
8
400
Group2
8
360/650
Group3
12
360/800
Table 9-9: Emergency Voltage Unbalance
This test will change the output voltage for each phase from 115 volts to 115V + offset. Refer to
Table 9-9 for the offset value and the Frequency. The test will last 30 minutes. The test will be
repeated for a second Frequency if applicable. The ← key (backspace) will terminate the test at
any time.
From the DO160 MENU Scroll to the ABNORMAL AC entry using the up and down cursor keys.
Press the ENTER key to select the ABNORMAL screens. The screen will appear as shown in
Figure 9-9.
Figure 9-9: Abnormal Screen
The ABNORMAL SCREEN has the following tests:
1
VOLT MAX
2
VOLT MIN
3
VOLT SURG
MX Series
205
4
VOLT DROP
5
FREQ TRANSIENTS
The above test can be selected by scrolling to the highlighted selection using the up and down
VOLT MAX
Standard/Group
Voltage
1
3
Frequency
RTCA
97
98.5
400
Group1
97
98.5
400
104
105.5
370
Group2
97
98.5
360
Group3
97
98.5
360
Group2
134
132.5
650
Group3
134
132.5
800
Table 9-10: Abnormal Voltage Minimum
Standard/Group
Voltage
Frequency
1
3
RTCA
134
120.5
400
Group1
134
132.5
400
122
120.5
430
Table 9-11: Abnormal Voltage Maximum
This test will set the voltage and frequency to levels defined by Figure 9-10 for 5 minutes. The
test will be repeated for Group1 only as indicated in Table 9-10 for voltage and Table 9-11 for
frequency. All Groups will repeat the test using Table 9-10 for the voltage setting and Table 910 or Table 9-11for the frequency setting. The ← key (backspace) will terminate the test at any
time.
VOLT MIN
This test will set the voltage and frequency to levels defined by Table 9-11 for 5 minutes. The test
will be repeated for Group1 only as indicated in Table 9-11. All Groups will repeat the test using
Table 9-11 for the voltage setting and Table 9-10 for the frequency setting. The ← key (backspace)
will terminate the test at any time.
VOLT UNDER
This test will drop the output voltage from 115 volts to 60 volts for 7 seconds.
VOLT SURGE
This test requires 180 volt output voltage. If the power source is set at the low voltage range,
the high voltage range will be selected before the test starts. At the end of the test the AC
source will be switched back to the low range.
The output voltage will surge to 180 volts for 100 ms. followed by drop to 148 volts for 1 sec
before it returns to 115 volts. The ← key (backspace) will terminate the test at any time.
FREQUENCY TRANSIENTS (Group 1 only)
Seq. No.
1
2
3
4
5
Frequency
400
480
400
320
400
Time
5 minutes
5 sec.
10 sec.
5 sec.
10 sec.
Table 9-12: Abnormal Frequency Transient
MX Series
206
This test will set the voltage at 115V and will remain at this voltage through out the test. The
test will cycle the frequency three times as shown in Table 9-12. Each repeat will start from
sequence 2.
9.3.1.6 DC TESTS
If the output voltage is set for 24V DC or 14V DC the DO-160 DC Main selection screen will
appear as seen in Figure 9-10.
Figure 9-10: DO-160 DC Main Menu
Note: Prior to test selection the Standard selection and Category selection are required. Use
the shuttle to select Standard RTCA or EUROCAE. Also, select equipment category A, B or Z.
9.3.1.6.1 Normal State Test
Scroll to the NORMAL STATE entry using the up and down cursor keys. Press the ENTER key
to select the NORMAL STATE screen. The screen will appear as shown in Figure 9-11.
Figure 9-11: Normal State
The DO-160 NORMAL screen has the following tests:
1. VOLT MIN
2. VOLT MAX
3. VOLT UNDER
4. VOLT SURGE
5. POWER INTERRUPT
key and the ENTER key to start the selected test. For some of these tests, numeric data entry
may be required to define the test number or the modulation rate.
VOLT MIN
Standard
RTCA
EUROCAE
A and Z
22.0
22.0
Categories
B 28V / 14V
22.0
11.0
25.1
12.5
Table 9-13: Normal Voltage Minimum
This test will change the output voltage from 28V or 14V to 22V or 11V. The test will last for 30
minutes. The ← (backspace) will terminate the test at any time.
MX Series
207
VOLT MAX
Standard
RTCA
EUROCAE
A and Z
30.3
30.3
Categories
B 28V / 14V
30.3
15.1
29.3
14.6
Table 9-14: Normal Voltage Maximum
This test will change the output voltage from 28V or 14V to 30.3V or 15.1V. The test will last for
30 minutes. The ← (backspace) will terminate the test at any time.
VOLT UNDER
This test applies to category Z and 28 volt category B equipment. The output voltage will drop to
10 volts and will ramp up at a rate of 0.15 volt/sec for the US standard and at a rate of 0.30
volt/sec for EUROCAE standard for 30 seconds before it returns to nominal value.
VOLT SURGE
This test will surge and sag the voltage to a level and duration specified Table 9-15 with 5
seconds between transients. The test is repeated three times.
Category
A
B
Z
Surge
Volt
Dwell(msec)
RTCA EUR
40
40
30
40
40
30
50
50
50
Volt
US
EUR
15
17
15
17
12
12
Sags
Dwell(msec)
30
30
30
Table 9-15: Voltage Surge
POWER INTERRUPT
Refer to section POWER INTERRUPT.
9.3.1.6.2 Abnormal Test
From the DO-160 MENU scroll to the ABNORMAL DC entry using the up and down cursor keys.
Press the ENTER key to select the ABNORMAL screen. The screen will appear as shown
Figure 9-12.
Figure 9-12: Abnormal State
The Abnormal Test has the following tests:
1.
2.
3.
4.
5.
MX Series
VOLT MIN
VOLT MAX
VOLT LOW
VOLT DROP
VOLT SURGE
208
VOLT MIN
This test will change the output voltage from 28V or 14V to 20.5V or 10V. The test will last for
30 minutes. The ← key (backspace) will terminate the test at any time.
VOLT MAX
This test will change the output voltage from 28V or 14V to 32.2V or 16V. The test will last for
30 minutes. The ← key (backspace) will terminate the test at any time.
VOLT LOW
This test applies for category B equipment.
This test will change the output voltage to the voltage minimum for one minute. The voltage will
decay linearly to zero voltage in a ten minute period before returning to its nominal voltage.
VOLT DROP
This test will change the output to 12V from 28V or to 6V from 14V for seven seconds. The
output voltage will return to nominal voltage after seven seconds.
VOLT SURGE
This test will produce voltage surge defined by Table 9-16. This test will be repeated three times
with ten seconds intervals. The voltage values are halved for 14.0V category B equipment.
Category
A
B
Z
Volt
46.3
60
80
Surge 1
Dwell(msec)
100
100
100
Volt
37.8
40
48
Surge 2
Dwell(msec)
1000
1000
1000
Table 9-16: Abnormal Voltage Surge
9.3.1.6.3 Emergency Test
The Emergency test is selected from the DO-160 DC Main Menu. This test will set the output
voltage to 18V for 28V equipment and to 9V for 14V equipment. The test will last for 30 minutes.
The ← key (backspace) will terminate the test at any time.
MX Series
209
9.4 Option –411: IEC 61000-4-11 Voltage Dips and Interruptions
9.4.1 General
The IEC 61000-4-11 option is capable of performing IEC 61000-4 section 11 voltage dips, short
interruptions and voltage variations immunity tests. On three phase MX Series AC sources, the
user can select one, two or all three phases to be active during the IEC 61000-4-11 tests in this
configuration.
9.4.2 Standard Revisions and EUT Classes
The–411 option supports both the first (1994-06) and the second edition (2004-03) of the IEC
61000-4-11 test standard as of firmware revision 0.31. Older firmware revisions only support the
first edition. Contact [email protected] for upgrade information. If Edition 2.0 is supported,
the standard revision can be selected when using the MXGui Windows program. From the front
panel, there is no need to select the revision but data values can be set that support either
version of the standard.
Generic tests files are distributed with the MXGui program for both editions of the test standard.
Files applicable to Edition 2.0 have ED20 in their file name. Do not mix these files, as the data
setup will not be correct if you do. To load a test file, select the Mode (Dips or Vars) and test
standard revision first, then use the File, Open menu to load the test parameters. Test
parameters can be a function of the EUT class. The different files provided with the program
cover the various EUT classes. The relevant EUT class 1, 2, 3 or X is listed in the file names.
When using front panel operation, the user has to set levels for each individual test step in
SINGLE mode.
9.4.3 Initial Setup
The user must set the operating frequency and voltage and close the output relay prior to the
start of test. It is possible to change the normal voltage (Ut) from the IEC1000-4-11 menus
before running each test.
9.4.4 Phase Selection
On three phase power source models, phase selection for individually executed dips or the
preset RUN ALL selection can be made using the PHASE key on the front panel. The phase or
phases selected will be displayed in the upper right hand corner of the LCD as either A, B, C,
AB, AC, BC or ABD.
With the introduction of Edition 2.0, three phase voltage dips testing has been redefined for both
Wye and Delta loads.
For Star (Wye) connected three-phase EUT’s,.voltage dips should be performed on both
individual Line-to-Neutral voltages as well as on all three Line-to-Line voltages. Thus, each test
should be run 6 times, each time selecting a different phase option: A, B, C, A+B, A+C and B+C.
For Delta connected three-phase EUT’s,.voltage dips, only Line-to-Line voltages dips have to be
run. Thus, each test can be run 3 times, each time selecting a different phase A+B, A+C and
B+C.
Note that the –411 option in MX Series AC sources with Firmware revision lower than 1.13 will
not support 2 phase out of 3 selections. MX Series I systems with firmware revision 1.17 or
higher and MX Series II systems with firmware revision 4.17 or higher support three phase dips
testing using the preferred method referenced in figure 4b) (A) of IEC 61000-4-11, Edition 2.0.
MX Series
210
MX units with revisions prior to this will change the L-N amplitude by the set dip level but retain
the normally programmed phase angle relationship. For firmware upgrades, contact
[email protected].
Note that required phase angles and amplitudes are automatically set for dips of 0, 40, 70, 80
and 100% to conform with method (A). For all other dip levels, method (A) can be used by
programming the required phase angles to be used during the programmed dips. The amplitude
and phase angles required to obtain the correct line-to-line voltage dip per method (A) for
standard dip levels of 40, 70 and 80% are embedded in the firmware and conform to table C.2 of
IEC 61000-4-34.
Since all phase programming on the MX series is referenced to phase A, voltage dip with a
phase angle for A other than 0° are implemented by offsetting all three phases by the required
number of degrees to get phase A at 0°. This is reflected in the actual output settings shown on
the MX versus the data in table C.2 of the IEC61000-4-34. The actual output settings are shown
in the last 3 columns.
Phase Mapping
The phase rotation on the MX series is ACB. This means phase A is mapped to L1, phase B is
mapped to L3 and phase C is mapped to L2. The required phase selection letter combination
for the required Line-to-line dip is shown in table C.2 for reference.
IEC Tables
L1
L2
L3
MX Reference
A
C
B
Table 9-17: Phase mapping
To select the desired phase-to-phase dip, select the phase selection as shown in column 8 and
either 80, 70 or 40 % dip level from the IEC411 screen or the Gui. Table C.2
Line to Line
L1-L2
L2-L3
Line to Neutral
L3-L1
L1-N
L2-N
Phase
L3-N
Selection
MX Setting
A-N
C-N
B-N
100% dip
(no dip)
100 %
150°
100 %
270°
100 %
30°
100 %
0°
100 %
120°
100 %
240°
n/a
100 %
0°
100 %
120°
100 %
240°
80% dip
L1-L2
80%
150°
100%
270°
92%
41°
72%
14°
100%
120°
100%
240°
AC
72%
0°
100%
106°
100%
226°
80% dip
L2-L3
92%
161°
80%
270°
100%
30°
100%
0°
72%
134°
230
240°
BC
100%
0°
72%
134°
100%
240°
80% dip
L1-L3
100%
150°
92%
281°
80%
30°
100%
0°
100%
120°
72%
254°
AB
100%
0°
100%
120°
72%
254°
70% dip
L1-L2
70%
150°
100%
270°
89%
47°
61%
25°
100%
120°
100%
240°
AC
61%
0°
100%
95°
100%
215°
70% dip
L2-L3
89%
167°
70%
270°
100%
30°
100%
0°
61%
145°
100%
240°
BC
100%
0°
61%
145°
100%
240°
70% dip
L1-L3
100%
150°
89%
287°
70%
30°
100%
0°
100%
120°
61%
265°
AB
100%
0°
100%
120°
61%
265°
40% dip
L1-L2
40%
150°
100%
270°
87%
67°
53%
79°
100%
120°
100%
240°
AC
53%
0°
100%
41°
100%
161°
40% dip
L2-L3
87%
187°
40%
270°
100%
30°
100%
0°
53%
199°
100%
240°
BC
100%
0°
53%
199°
100%
240°
40% dip
L1-L3
100%
150°
87%
307°
40%
30°
100%
0°
100%
120°
53%
319°
AB
100%
0°
100%
120°
53%
319°
Table 9-18: IEC 61000-3-34 Table C.2
MX Series
211
Other Dip levels for 2 phase selections.
Note that any other dip level not listed in this table will result in voltage dips conform method (B)
so both phases will dip by the actual dip percentage set.
To implement user defined three phase dips other than those listed in this table, the IEC411
phase setting for phases A, B and C may be used to set the desired phase angle for each dips.
This setting is ignored if the dip levels is set to 80, 70 or 40 but otherwise controls the phase
angle of the selected phase during the dip.
To set the phase angle for a voltage dip, select the individual phase using the PHASE key and
use the PHASE = field in the 411 screen to set the required phase angle. Note that this is not
the start phase angle for the dip but rather the phase offset with respect to phase A. (Requires
FW 1.17 on Series I MX units or 4.17 on Series II MX units.
9.4.5 Tests Performed
9.4.5.1 DIPS AND INTERRUPTIONS
1.
Run All
2.
Run predefined sequence of tests.
Run Single
Run user defined test.
9.4.5.2 VOLTAGE VARIATIONS
1.
Run All
2.
Run predefined sequence of tests.
Run Single
Run user defined test.
9.4.6 Front Panel Entry
To perform a test from the keyboard, select the APPLICATIONS screen from the MENU 2
screen. The APPLICATIONS screen will appear as shown in Figure 9-13
Scroll to the IEC 1000-4-11 entry using the up and down cursor keys. Press the ENTER key to
select the IEC 1000-4-11 main menu. The screen will appear as shown in Figure 9-14.
Figure 9-14: IEC1000-4-11 Menu
MX Series
212
9.4.6.1 DIPS AND INTERRUPTIONS TEST
Scroll to the DIPS AND INTERRUPTIONS entry using the up and down cursor keys. Press the
ENTER key to select the DIPS AND INTERRUPTIONS menu. The screen will appear as shown
in Figure 9-15.
Figure 9-15: IEC Dips and Interrupts
STATE
This field enables or disables the -411 test mode.
EOS STATE
This field is not available on MX Series systems.
RUN ALL
The RUN ALL selection will cause the following automated test sequence suggested by the
standard to be run:
Step
Output in
% of UT
No of Cycles
Start angle
(Degrees)
Repeat #
times
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
0
0
0
0
0
0
0
40
40
40
40
40
40
40
70
70
70
70
70
70
70
0.5
0.5
1
5
10
25
50
0.5
0.5
1
5
10
25
50
0.5
0.5
1
5
10
25
50
0
180
0,45,90
45,90,135
90,135,180
180,225,270
270,315,0
0
180
0,45,90
45,90,135
90,135,180
180,225,270
270,315,0
0
180
0,45,90
45,90,135
90,135,180
180,225,270
270,315,0
3
3
3 at diff ø
3 at diff ø
3 at diff ø
3 at diff ø
3 at diff ø
3
3
3 at diff ø
3 at diff ø
3 at diff ø
3 at diff ø
3 at diff ø
3
3
3 at diff ø
3 at diff ø
3 at diff ø
3 at diff ø
3 at diff ø
Delay
between
repeats (s)
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
Table 9-19: Dips and Interruptions Tests Performed During RUN ALL
The user can change the NOMINAL Ut voltage for this. The RUN ALL Command line will change
to ABORT during the test. Selecting ABORT and pressing the ENTER key will terminate the test
at any time and the output voltage will return to the nominal value.
PHASE SELECTION
MX Series
213
Voltage Dips and Interruptions can be run on an individual phase, two phases or all three
phases. The PHASE key on the front panel can be used to select the desired phase mode. The
active phase mode is indicated in the upper right hand corner of the LCD display.
On MX Series with firmware revision 1.13 or higher, it is also possible to select two out of three
phases. This allows line-to-line voltage drops as called out in Edition 2.0 of the IEC 61000-4-11
to be performed as well.
RUN SINGLE
RUN SINGLE command will run a single test once. The Dip or Interrupt test is defined by the
DIP TO, NO CYCLES, and START ANGLE parameters. These parameters must be set before
starting the test. The following is a description of these parameters.
DIP TO:
The dip voltage level as a percentage of the nominal voltage.
NO CYCLES:
The dip duration in cycles.
START ANGLE:
The start phase angle of the dip
Note: After each individual run, a 10 second delay is inserted.
MX Series
214
9.4.6.2 VOLTAGE VARIATION TESTS
From the IEC1000-4-11 Main Menu screen shown in Figure 9-14, scroll to the VOLTAGE
VARIATIONS entry using the up and down cursor keys. Press the ENTER key to select the
VOLTAGE VARIATIONS menu. The screen will appear as shown in Figure 9-16.
Figure 9-16: Voltage Variation Screen
RUN ALL
The RUN ALL selection will cause the following automated test sequence suggested by the
standard to be run:
Step
Type
Start V in % of
UT
Dwell time
End V in % of
UT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
VSweep
Hold
VSweep
VSweep
Hold
VSweep
VSweep
Hold
VSweep
VSweep
Hold
VSweep
VSweep
Hold
VSweep
VSweep
Hold
VSweep
100
40
40
100
40
40
100
40
40
100
0
0
100
0
0
100
0
0
2
1
2
2
1
2
2
1
2
2
1
2
2
1
2
2
1
2
40
40
100
40
40
100
40
40
100
0
0
100
0
0
100
0
0
100
Delay between
steps (s)
0
0
10
0
0
10
0
0
10
0
0
10
0
0
10
0
0
10
Table 9-20: Voltage Variations Test Performed During RUN ALL
The user can change the NOMINAL Ut voltage for this test. The RUN ALL Command line will
change to ABORT during the test. Selecting ABORT and pressing the ENTER key will terminate
the test at any time and the output voltage will return to the nominal value.
MX Series
215
RUN SINGLE
RUN SINGLE command will run the test once. The Variation test is defined by the REDUCE TO,
FALL TIME, HOLD TIME and RISE TIME parameters. These parameters must be set before
starting the test. The following is a description of these parameters.
REDUCE TO:
FALL TIME:
HOLD TIME:
RISE TIME:
The lowest voltage level as a percentage of the nominal voltage.
The time in seconds it will take the output to reach the REDUCE TO voltage.
The time in seconds the output will hold at the REDUCE TO voltage.
The time in seconds the output will reach the NOMINAL voltage from the
REDUCE TO voltage
The timing of voltage variations is different between editions 1.0 and 2.0 of the IEC 61000-4-11
test standard. While the original standard used voltage ramps on both sides of the variation test
level, the Edition 2.0 standard calls out an abrupt drop to the test level, followed by a voltage
ramp back to the nominal voltage. Thus, for Edition 2.0, the fall time must be set to 0.000
seconds. This requires firmware revision 0.31 or higher. Older firmware revision will not accept
0.000 sec for fall time. The shortest allowable fall time for older revision firmware is 0.02 sec.
Furthermore, where under Edition 1.0 rise and fall times were specified in seconds, they are
specified in number of cycles in Edition 2.0. This is an effort to normalize both 50 Hz and 60 Hz
voltage variations.
Refer to Figure 9-17 and Figure 9-18 for an illustration of how these parameters affect the V
RMS output under the different standard revisions.
Figure 9-17: EN 61000-4-11 Voltage Variation specification- Edition 1.0
Figure 9-18: EN 61000-4-11 Voltage Variation specification- Edition 2.0
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9.4.7 Using the MXGui Windows Program for IEC 61000-4-11 Testing
Figure 9-19: IEC 61000-4-11 GUI screen.
The MXGui Windows control program will detect the presence of the –411 option on the MX AC
power source. Test reports can be generated at the end of a test for documentation purposes.
To support Edition 2.0 of the IEC 61000-4-11 test standard, version 1.20 or higher of the MXGui
is required. Older versions of the MXGui will only support Edition 1.0 tests. The desired Edition
can be selected by the user and provides the relevant data entry mode for the Edition selected.
Generic tests files are distributed with the MXGui program for both editions of the test standard.
Files applicable to Edition 2.0 have ED20 in their file name. Do not mix these files, as the data
setup will not be correct if you do. To load a test file, select the Mode (Dips or Vars) and test
standard revision first, then use the File, Open menu to load the test parameters. Test
parameters can be a function of the EUT class. The different files provided with the program
cover the various EUT classes. The relevant EUT class 1, 2, 3 or X is listed in the file names.
The user must select the desired test type before executing the test. Since both test types
require a number of test parameters, the test sequence parameters must be entered in the data
entry grid or loaded from disk using the File, Open menu entry.
For complete details on how to use the MXGui –411 option test screen, refer to the on-line help
of the MXGui program available from the Help menu.
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9.5 Option –413: IEC 61000-4-13 Interharmonics Test
9.5.1 General
The IEC413 option is capable of performing IEC 61000-4 section 13 Harmonics and inter
harmonics low frequency immunity tests. The tests are based on IEC 61000-4-13:2002-03, First
Edition. It is assumed that the user has a copy of the test standard available. This manual
section only covers operation of the –413 option from the front-panel of the MX Series power
source.
Note 1: The initial release of the –413 option for the MX Series power sources was based on a
draft version (CDV) of the IEC 61000-4-13 standard. Minor changes were made between the
CDV draft and the final released version. Units with firmware revision 0.31 or higher conform to
the official released IEC standard. Units with older firmware conform to the draft version. A
firmware upgrade can be ordered through AMETEK Programmable Power’s service department
by contacting [email protected] and requesting part number CIC637. Provide
the model and serial number of the unit (master unit in multi-box systems) to ensure the correct
firmware is provided. The firmware revision is displayed on the LCD screen immediately after
power up for a few seconds. It can also be queried over the bus using the “*IDN?” command.
Where relevant, the requirement for the correct firmware revision to obtain specific test modes is
indicated in this manual.
Note 2: The –413 option is only available on MX45-3Pi Series AC power sources, not MX45-1
or MX45-3 Series as it requires arbitrary waveform capability.
9.5.2 Initial Setup
The user must set the operating voltage and close the output relay prior to the start of test. The
following set of parameters must be set before the start of test.
1. Frequency to 50 or 60 Hz.
2. Voltage mode to AC.
3. Waveform to sine wave.
9.5.3 Tests Performed
The IEC1000-4-13 test consists of several types of tests. These tests can be run individually or
in sequence (ALL). The following tests are available:
1. Harmonic combination test flat curve and over swing.
2. Sweep in frequency and resonance frequency detection.
3. Individual harmonics and inter harmonics.
4. Meister curve test (Firmware revision 0.31 or higher required)
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9.5.4 Front Panel Entry
While it is possible to perform IEC 61000-4-13 testing from the front panel of the MX Series AC
power source, it is recommended to use the provided MXGui Windows program for report
generation. This also provides a more convenient way to perform Class 1 and User class tests
as test levels can be saved to disk.
To perform a test from the keyboard, select the APPLICATIONS screen from the MENU 2
screen. The APPLICATIONS SETUP 1 screen will appear. Move to the MORE field to proceed
to the APPLICATIONS SETUP 2 screen as shown in Figure 9-20. (Note: On Series I MX
models, the IEC 1000-4-13 option is located on the APPLICATIONS SETUP screen instead as
there is only one APPLICATIONS SETUP screen.)
Figure 9-20: Application Setup Menus
Scroll to the IEC 1000-4-13 entry using the up and down cursor keys. Press the ENTER key to
select the IEC 1000-4-13 main menu. The screen will appear as shown in Figure 9-21.
Figure 9-21: IEC1000-4-13 Menu
9.5.4.1 IEC Screen Parameters
The IEC 1000-4-13 has the following common fields for all IEC1000-4-13 test groups.
STATE
The STATE field must be set to ON before the test can run. Initial setup conditions must be met
to run the test. See section 9.5.2.
RUN
The RUN field has the following selections:
1. ALLRun all IEC 1000-4-13.
2. GROUP
Run the selected group.
3. RANGE
Run the selected range for the selected group.
4. POINT
Run the selected frequency for the selected range and selected group.
Note: The RANGE and POINT do not apply to all groups. See individual groups for details.
When the test is running, this field will have the following selection:
1. ABORT
The test will stop running and all parameters will return to the state prior to the
start of the test.
2. PAUSE
The test will pause at the time the ENTER key is pressed while the PAUSE field
is selected. The field will change to RESUME. When the ENTER key is
pressed again, the test will resume from the point it stopped.
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EUT CLASS
This field selects the desired product or EUT class. There are three EUT classes. Class 2 and 3
are predefined by the standard and its level parameters cannot be changed. The user class can
be edited at any time. Changing between class 2 and 3 can be done while the state is on.
Changing to the user class requires the state to be in the off position.
For Class 1 EUT, the user class must be used. Only class 2 and 3 test levels are preprogrammed. When using the provided, MXGui Windows program, class 1 tests are set up by
the MXGui program automatically.
GROUP
This field selects the GROUPs. Selecting a group is required for editing the data fields
associated with the group as well as running the individual group if run group is selected. The
field has the following groups:
1. FCURVE
This is the first part of harmonic combination test.
2. OSWING
This is the second part of harmonic combination test.
3. SWEEP
This is the sweep in frequency and resonance frequency detection.
4. HRAM
This is the first part of the Individual harmonics and interharmonics test.
5. IHARM
This is the second part of the Individual harmonics and interharmonics test.
6. MCURVE
This is the Meister test. (Firmware revision 0.31 or higher required)
See the appropriate sections for details on each group.
DWELL
This field will show the dwell time in seconds for each group during the test and will allow
changes to the dwell time to be made.
The dwell time for the Meister curve group is the dwell time for each inter harmonics. This
combined with the frequency step size results in a 5-minute test time per frequency decade.
The dwell time for the sweep group is the dwell time for each frequency decade.
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9.5.4.2 IEC GROUPS
This section will describe the groups and parameters associated with IEC 1000-4-13. Refer to
paragraph 9.5.4.1 for groups associated with the test.
FCURVE GROUP
If the FCURVE group is selected, the screen will appear as shown in Figure 9-22. The screen
has the following parameters that are unique to the group:
Figure 9-22: IEC 1000-4-13 FCURVE
1. LEVEL
Set the Flat curve clip level. This field can be set when the IEC 1000-4-13 is in
the OFF state and the Class is set for USER class.
2. PAUSE
Time in seconds the test will pause prior to proceeding to the following test. This
field can be set at any time when the test is not running.
OSWING GROUP
If the OSWING group is selected, the screen will appear as shown in Figure 9-23. The screen
Figure 9-23: IEC 1000-4-13 OSWING
1. LEVEL
The level of the harmonics relative to the fundamental in percent. There are
two levels, one for harmonic #3 and the other for harmonic #5. The harmonic
number must be selected prior to the harmonic level entry. To change levels,
the test state must be off and USER class must be selected.
2. HARM NO There are only two harmonic numbers. This field is used to set the harmonics
level that corresponds to the harmonics number.
3. PHASE
Sets the phase angle of the harmonics relative to the fundamental. The phase
can be set when the test state is off and USER class is selected.
4. PAUSE
Sets the time in seconds. The test will pause prior to proceeding to the
following test. This field may be changed at any time as long as the test is not
running.
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SWEEP GROUP
If the SWEEP group is selected, the screen will appear as shown in Figure 9-24. The screen
Figure 9-24: IEC 1000-4-13 SWEEP
1. LEVEL
Sets the percentage level of the interharmonics relative to the fundamental.
The level is fixed for the entire frequency range, which is defined by
FRANGE. To change level, the test state must be off and user class must be
selected.
2. FRANGE
The range is selected by rotating the shuttle. The range selection is required
to change the level for the selected range. Also, an individual range sweep
is possible by selecting the desired range and selecting RUN RANGE from
the RUN field.
3. STEP
The step size defines the interharmonics sweep points. Step size is fixed for
the entire sweep range. The STEP size can be changed when the test state
is off.
4. IHFREQ
This field will show the current interharmonic frequency when the test is
running. An interharmonic frequency can be selected using the shuttle. To
run a frequency without sweeping through the entire range, a RUN POINT
can be selected.
5. RESONANT This field is used to report the resonant points, if any, after running the sweep
test. No editing is allowed in this field. When the test is completed, a display
of harmonics current versus frequency plot is available. To view the graph,
select the field and press the ENTER key.
HARMONICS GROUP
If the Harmonics group is selected, the screen will appear as shown in Figure 9-25. The screen
Figure 9-25: IEC 1000-4-13 Harmonics
1. LEVEL
Sets the percentage level of the harmonic relative to the fundamental. Each
level is associated with a harmonic number. To change levels, the test state
must be off and user class must be selected.
2. HARM NO Selecting a harmonic number using the shuttle knob will allow examination of
the LEVEL and PHASE of each harmonic and changing the level and phase
angle when USER class is selected.
3. PHASE
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Sets the phase angle of the harmonics relative to the fundamental. To change
phase, the test state must be off and user class must be selected.
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4.
PAUSE
Sets the pause time in seconds between harmonics tests. There is only one
value for the entire test. The PAUSE value can be changed when the test is not
running.
IINTERHARMONICS GROUP
If the Harmonics group is selected, the screen will appear as shown in Figure 9-26. The screen
Figure 9-26: IEC 1000-4-13 INTERHARMONICS
1. LEVEL
Sets the percentage level of the inter harmonics relative to the fundamental.
The level is fixed for the entire frequency range defined by FRANGE. To
change levels, the test state must be off and user class must be selected.
2. FRANGE
The range is selected by rotating the shuttle. The range selection is required to
change the level. An individual range step can be run by selecting the desired
range, followed by RUN RANGE from the RUN field.
3. STEP
The step size defines the inter harmonics sweep points. This step size is fixed
for the entire range of the sweep. The STEP size can be changed when the
test state is off.
4. IHFREQ
This field shows the current inter harmonic frequency when the test is running.
An inter harmonic frequency can be selected with the shuttle. To run an inter
harmonic frequency without sweeping through the entire range, RUN POINT
must be selected.
5. PAUSE
Sets the time in seconds for which the test will pause between inter harmonic
frequencies. There is only one value for the entire test. The PAUSE can be set
when the test is not running.
MEISTER CURVE GROUP
If the Meister curve group is selected, the screen will appear as shown in Figure 9-27. The
screen has the following parameters that are unique to the group:
Figure 9-27: IEC 61000-4-13 Meister Curve
1.
LEVEL
Sets the percentage level of the inter harmonics relative to the
fundamental. The level is fixed for the entire frequency range defined by FRANGE. To
change levels, the test state must be off and user class must be selected.
2.
FRANGE
The range is selected by rotating the shuttle. The range selection is
required to change the level. An individual range step can be run by selecting the
desired range, followed by RUN RANGE from the RUN field.
3.
STEP
The step size defines the inter harmonics sweep points. This step size is
fixed for the entire range of the sweep. The STEP size can be changed when the test
state is off.
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4.
PAUSE
Sets the time in seconds for which the test will pause between ranges.
There is only one value for the entire test. The PAUSE can be set when the test is not
running. For the Meister curve test, the pause time is normally set to 0 secs. If a value
other than 0 is entered, the inter harmonics are set to 0% during the pause times.
5.
RESONANT This field is used to report the resonant points, if any, after running the
Meister curve test. No editing is allowed in this field. When the test is completed, a
display of harmonics current versus frequency plot is available. To view the graph,
select the field and press the ENTER key.
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9.5.4.3 RUNNING THE TEST
The test sequence used is a function of the EUT class. The end user needs to determine the
appropriate class of EUT. The test protocol is document in the IEC 61000-4-13 test standard.
For reference, the test flow charts are shown here. It is assumed that the end user has a copy of
the actual test standard however.
Start - Class 1/2
Determine appropriate test
configuration
Perform 8.2.1 Test
"Harmonic combination"
Flatcurve and Overswing
Any functional
anomalies?
No
Yes
Class 2
required?
No
'Meister
curve' required?
Yes
No
Perform 8.2.4 Test
"Meister Curve"
Perform 8.2.2 Test
"Frequency Sweep"
Yes
Any functional
anomalies?
No
Yes
Any functional
anomalies?
No
Perform 8.2.3 Test
"Individual Harmonics/
Interharmonics"
Yes
Test Completed
FAIL
Record Results
Yes
Any functional
anomalies?
No
Test Completed
PASS
Record Results
Figure 9-28: IEC 61000-4-13 Test Flowchart Class 1 and 2
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Start - Class 3
Determine appropriate test
configuration
Perform 8.2.1 Test
"Harmonic combination"
Flatcurve and Overswing
Any functional
anomalies?
No
Perform 8.2.2 Test
"Frequency Sweep"
Yes
Yes
Any functional
anomalies?
No
Any functional
anomalies?
No
Perform 8.2.4 Test
"Meister Curve"
Yes
Perform 8.2.3 Test
"Individual Harmonics/
Interharmonics"
Yes
Any functional
anomalies?
No
Perform 8.2.3 Test
Only table 1. Odd
non-multiple of
3 harmonics
Test Completed
FAIL
RecordResults
Yes
Any functional
anomalies?
No
Test Completed
PASS
Record Results
Figure 9-29:IEC 61000-4-13 Test Flowchart Class 3
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To run the test, the IEC 1000-4-13 mode must be selected. Refer to paragraph 4 for access to
the screen. The following conditions have to be met before running the test:
1. Prior to the test, set the nominal voltage, frequency, and phase angle. The frequency must
be 50 or 60 Hz. Function must be set to sine wave.
2. Select EUT CLASS 2, 3 or USER. The default parameters for the USER class are identical
to those for class 3. If USER class is selected, the level and phase parameters can be
edited.
3. Set the STATE to ON. It will take a few seconds to initialize data required to perform the
test.
4. If it is desired to run all tests, select ALL from the RUN parameter with the shuttle knob and
press the ENTER key. The tests will run in the following sequence:
FCURVE, OSWING, SWEEP, HARM, IHARM
Note: The test for class 3 will take about 25 minutes, class 2 slightly less.
5. While the test is running, the ABORT and PAUSE selection is accessible from the RUN
field by rotating the shuttle.
6. If it is desired to run a specific group, the group must be selected from the group screen.
Also, the RUN GROUP must be selected prior to the start of test.
7. To run an individual range, applicable for sweep and individual harmonics only, the desired
range and the RUN RANGE mode must be selected prior to the start of the test. In case the
harmonics group is selected, RUN RANGE will run the harmonics from the second
harmonics to the harmonics number specified by the HARM NO field. See Figure 9-25.
8. To run individual harmonics or individual inter harmonics, set the harmonic number or the
inter harmonics frequency and select RUN POINT prior to running the test.
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9.5.4.4 INTERHARMONICS
A single inter harmonic frequency may be generated using the INTERHARMONICS screen. This
screen allows insertion of any inter harmonic from 1Hz to 2400Hz in 1Hz steps. The amplitude
level of the harmonics range is from 0 to 20% of the programmed voltage. To select the inter
harmonics screen, press the menu screen until the MENU 2 screen appears as shown in Figure
9-30. Select INTERHARMONICS using the up or down key.
Figure 9-30: MENU 2 SCREEN
INTERHARMONICS SCREEN
The inter harmonics screen will appear as shown in Figure 9-31. This screen has the following
parameters:
Figure 9-31: INTERHARMONICS SCREEN
1. REFERENCE
This field will enable the Inter harmonics generator if ON is selected and
will disable the inter harmonics generation if OFF is selected.
2. REF. COUPL
If turned on, the REF. VOLT will follow the programmed voltage value.
3. REF. VOLT
This field must be programmed to a value if REF. COUPL is off. This
value has a range from 0 to 230 volts. This value is set to a value
equal to the phase A voltage if the REF. COUPL is turned on.
4. VOLTAGE
This field programs the Inter harmonic level in percentage of the
REF.VOLT. This value has a range from 0 to 20%
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9.6 Option –704: MilStd704 Tests
The MIL704 option is made up of both firmware that resides in the power source and the MXGui
Windows application program. The firmware covers revision D and E of the Mil-Std704 standard.
The MXGui covers the remaining revisions A, B, C and F. This provides coverage of all
available standard revisions.
The user interface for each implementation is different however. The revision D and E tests can
be operated directly from the power source’s front panel or through the supplied MXGui
program. The revision A-C, F tests can only be operated through the supplied MXGui program.
Thus, for rev A-C and F, a Windows PC and interface is required.
Section 9.6.1 covers operation of the firmware based revision D and E tests.
For information regarding the operation of the MIL-STD-704 revision A, B, C, and F tests with
the MXGui, please refer to the Avionics Software Manual (CI part no. 4994-971 included on
CDROM). Note that future updates of the MXGui may include overlapping coverage for
revisions D and E in the software as the MXGui program is designed to support all revisions.
For now, revisions D and E have no associated data files in the MXGui.
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9.6.1 Option –704: MIL-STD-704 rev D & E Tests. (Firmware)
9.6.1.1 General
The MIL704 option is capable of performing most sections of MIL-STD-704 rev D and E in either
of the AC or DC mode.
Note:
The Distortion Spectrum tests:
Table I and II, Figure 7
Table III, Figure 12
Table IV, Figure 18
are not supported by the –704 option. These tests require the use of additional
external equipment.
9.6.1.2 Initial Setup
Nominal parameters for the AC Power source are as follows:
Output Voltage
115V L-N
Output Frequency
400 Hz
Nominal parameters for the DC Power source are as follows:
Output Voltage
28V or 270V L-N
A setting outside these nominal values will disable the test and will prevent access to its Menu
screens.
9.6.1.3 Revision
The MIL704 option defaults to Revision E. The System is capable of performing
Revision D test by changing the selection to Revision D. All Revision D tests can be performed
except for the 270V DC TRANSIENT and ABNORMAL. For these tests, Revision E test levels
are used despite the revision D selection.
All levels and timing in this document refers to Revision E. For Revision D, refer to MILSTD-704D date 9/30/1980
9.6.1.4 Tests Performed
9.6.1.4.1 STEADY STATE
AC Mode:
1. Steady State Voltage and Frequency test
2. Waveform Distortion test
3. Voltage Modulation test
4. Voltage Unbalance test
5. Phase Unbalance test
6. Frequency Modulation test
7. Transient Voltage low and high test
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8. Transient Frequency low and high test
DC Mode:
1. Steady State Voltage test
2. Ripple test
AC Mode:
1. Emergency Voltage minimum and maximum test
2. Emergency Frequency minimum and maximum test
DC Mode:
1. Emergency Voltage minimum and maximum test
AC Mode:
1. Abnormal Voltage under
2. Abnormal Voltage over
3. Abnormal Frequency under
4. Abnormal Frequency under
DC Mode:
1. Abnormal Voltage under
2. Abnormal Voltage over
9.6.1.5 Front Panel Entry
To perform a test from the keyboard, from the MENU 2 screen, select the APPLICATIONS
screen. The APPLICATIONS screen will appear as shown in Figure 9-32.
Scroll to the MIL-STD-704 entry using the up and down cursor keys. Press the ENTER key to
select the MIL704 main menu. One of the screens will appear as shown in Figure 9-33. The
voltage mode and setting will define which menu to select. Refer to Section 9.6.1.2
Note: The user has to turn on the Output relay before starting a test and set the steady state
setup for the test.
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Figure 9-33: MIL704 Menu
9.6.1.6 Revision Selection
The default Revision is E. Revisions supported are D and E. The Revision can be changed from
the front panel. Scroll to the REVISION entry using the up and down cursor keys (see Figure
9-33). Use the shuttle to change the selection.
9.6.1.7 AC MODE TESTS
9.6.1.7.1 Steady State Test
Scroll to the STEADY STATE AC entry using the up and down cursor keys. Press the ENTER
key to select the STEADY STATE screens. The screen will appear as shown in Figure 9-34.
Figure 9-34: Steady State Menu
The MIL704 Steady state 1 and Steady state 2 screens have the following tests:
1
VOLTAGE
2
FREQUENCY
3
VOLT UNBALANCE
4
PHASE DIFFERENCE
5
VOLT MODULATION
6
FREQ MODULATION
7
DISTORTION
cursor keys and the ENTER key to start the selected test.
VOLTAGE
This test will change the output voltage in the following sequence:
•
108V for 1 minute.
•
118V for 1 minute.
•
115V for 1 minute.
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FREQUENCY
This test will change the output frequency in the following sequence:
•
393Hz for 1 minute.
•
407Hz for 1 minute.
•
400Hz for 1 minute.
VOLT UNBALANCE
This test will change the output voltage for the selected phase only in the following sequence:
•
112V for 1 minute.
•
118V for 1 minute.
•
115V for 1 minute.
The test will be repeated on three phase systems to include all three phases if the coupling is
set to all.
PHASE DIFFERENCE
This test applies to three phase systems only. The phase angle for the selected phase will
change relative to phase A in the following sequence:
If phase B is selected:
•
236° for 1 minute.
•
244° for 1 minute.
•
240° for 1 minute.
If phase C is selected:
•
116° for 1 minute.
•
124° for 1 minute.
•
120° for 1 minute
VOLTAGE MODULATION
This test will vary the output voltage by ±2.5V rms over a period of one second. The test will last
for 2 minutes. The ← key (backspace) will terminate the test at any time.
FREQUENCY MODULATION
This test will vary the output frequency by ±4Hz over a period of one minute. The test will last
for 4 minutes. The ← key (backspace) will terminate the test at any time.
WAVEFORM DISTORTION
This test will generate a 5% THD voltage distortion on the output voltage waveform. The
distortion is caused by using a clipped sine wave. The test will last for 1 minute. The ← key
(backspace) will terminate the test at any time.
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9.6.1.7.2 TRANSIENT TEST
From the MIL704 main menu (Figure 9-33) scroll to the TRANSIENT AC entry using the up and
down cursor keys. Press the ENTER key to select the TRANSIENT screens. The screen will
appear as shown in Figure 9-35.
Figure 9-35: Transient Menu
The MIL704 Transient screen has the following tests:
1
HIGH VOLTAGE
2
LOW VOLTAGE
3
HIGH FREQUENCY
4
LOW FREQUENCY
HIGH VOLTAGE
This test will change the output voltage for the selected phase in the following sequence:
•
180V for 10 msec.
•
Linearly reduced to118V in 78msec.
•
Stay at 118V for 87msec before returning to 115V.
Prior to the test, a range change may take place if the power source is set for the low voltage
range.
Note: A range change will result in momentary loss of power to the EUT. If this is not
acceptable, the power source must be left in high range at all times.
LOW VOLTAGE
This test will change the output voltage for the selected phase only in the following sequence:
•
80V for 10 msec.
•
Linearly increase to108V in 70msec.
•
HIGH FREQUENCY
•
425Hz for 1 sec.
•
420Hz for 4 sec.
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•
410Hz for 5 sec.
•
407Hz for 4 sec.
LOW FREQUENCY
•
375Hz for 1 sec.
•
380Hz for 4 sec.
•
390Hz for 5 sec.
•
393Hz for 4 sec.
From the MIL704 main menu (Figure 9-33) scroll to the EMERGENCY AC entry using the up
and down cursor keys. Press the ENTER key to select the EMERGENCY screens. The screen
will appear as shown in Figure 9-36.
Figure 9-36: Emergency Menu
The EMERGENCY SCREEN has the following tests:
1
VOLTAGE
2
FREQUENCY
VOLTAGE
This test will change the output voltage in the following sequence:
•
108V for 1 minute.
•
118V for 1 minute.
•
115V for 1 minute.
FREQUENCY
•
393Hz for 1 minute.
•
407Hz for 1 minute.
•
400Hz for 1 minute.
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From the MIL704 main menu (Figure 9-33) scroll to the ABNORMAL AC entry using the up and
down cursor keys. Press the ENTER key to select the ABNORMAL screens. The screen will
appear as shown in Figure 9-37.
Figure 9-37: Abnormal Screen
The ABNORMAL SCREEN has the following tests:
1
OVER VOLTAGE
2
UNDER VOLTAGE
3
OVER FREQUENCY
4
UNDER FREQUENCY
The above test can be selected by scrolling to the highlighted selection using the up and down
OVER VOLTAGE
•
180V for 50msec.
•
The voltage gradually decays with time to 125 volt by the following equation:
V = 124.6 + 2.77/t. for 0.05 ≤ t ≤ 6.925
•
Stay at 125V for 93 seconds before returning to 115V.
Prior to the test, a range change may take place if the power source is set at the low voltage
range.
UNDER VOLTAGE
•
0V for 7 seconds.
•
100V for 93 seconds.
•
OVER FREQUENCY
•
480Hz for 5 seconds.
•
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UNDER FREQUENCY
•
0Hz for 7 seconds.
•
9.6.1.8 DC TESTS
If the output voltage is set for 28V DC or 270V DC the MIL704 DC Main selection screen will
appear as seen in Figure 9-38.
Figure 9-38: MIL704 DC Menu
9.6.1.8.1 Steady State Test
Scroll to the STEADY STATE entry using the up and down cursor keys. Press the ENTER key
to select the STEADY STATE screen. The screen will appear as shown
Figure 9-39: Steady State DC
The MIL704 STEADY STATE screen has the following tests:
1
VOLTAGE
2
RIPPLE
VOLTAGE
1. 28V system:
•
22V for 1 minute.
•
29V for 1 minute.
•
28V for 1 minute.
2. 270V system:
•
250V for 1 minute.
•
280V for 1 minute.
•
270V for 1 minute.
MX Series
237
RIPPLE
This test will impose a 400Hz frequency component to the output voltage. The test will last for 2
minutes. The level of the ripple is as follows:
1.
28V system:
±1.5V.
2.
270V system:
±6.0V.
9.6.1.8.2 Transient Test
From the MIL704 DC MENU scroll to the TRANSIENT DC entry using the up and down cursor
keys. Press the ENTER key to select the TRANSIENT screen. The screen will appear as
Figure 9-40: Transient Menu
The Transient Test has the following tests:
1
HIGH VOLTAGE
2
LOW VOLTAGE
HIGH VOLTAGE
1. 28V System
•
50V for 12.5 msec.
•
Linearly reduce to29V in 70msec.
•
Stay at 29V for 92.5msec before returning to 28V.
2. 270V System
•
330V for 20 msec.
•
Linearly reduce to280V in 20msec.
•
Prior to the test, a range change may take place if the power source is set for the low voltage
range.
MX Series
238
LOW VOLTAGE
1. 28V System
•
18V for 15 msec.
•
Linearly increase to 22V in 85msec.
•
2. 270V System
•
200V for 10 msec.
•
Linearly increase to 250V in 30msec.
•
9.6.1.8.3 Abnormal Test
From the MIL704 DC MENU scroll to the ABNORMAL DC entry using the up and down cursor
keys. Press the ENTER key to select the ABNORMAL screen. The screen will appear as
Figure 9-41: Abnormal Test Screen
The Abnormal Test has the following tests:
1
OVER VOLTAGE
2
UNDER VOLTAGE
cursor keys and the ENTER key to start the selected test.
OVER VOLTAGE
1. 28V system:
•
50V for 50msec.
•
The voltage gradually decays with time to 31.5 volts by the following equation:
V = 31.38 + 0.93/t. for 0.05 ≤ t ≤ 7.758
•
Stay at 31.5V for 92.242 seconds before returning to 28V.
2. 270V system:
•
350V for 50msec.
•
The voltage gradually decays with time to 290 volts by the following equation:
V = 289.6 + 3.02/t. for 0.05 ≤ t ≤ 7.55
•
Stay at 290V for 92.45 seconds before returning to 270V.
MX Series
239
Prior to the test, a range change may take place if the power source is set at the low voltage
range. Note: See Section 9.6.1.7.2 under HIGH VOLTAGE.
UNDER VOLTAGE
1. 28V system:
•
0V for 7sec.
•
20V for 93sec.
2. 270V system:
•
0V for 7sec.
•
240V for 93sec.
9.6.1.8.4 Emergency Test
From the MIL704 DC MENU scroll to the EMERGENCY DC entry using the up and down cursor
keys (Figure 9-42). Press the ENTER key to start the EMERGENCY TEST.
Figure 9-42: Emergency Test
VOLTAGE
1. 28V system:
•
18V for 1 minute.
•
29V for 1 minute.
•
28V for 1 minute.
2. 270V system:
•
250V for 1 minute.
•
280V for 1 minute.
•
270V for 1 minute.
MX Series
240
9.7 Option –ABD: Airbus ABD0100.1.8 Test
For information regarding the operation of the ABD0100.1.8 tests with the MXGui, please refer
to the Avionics Software Manual (CI part no. 4994-971 included on CDROM).
9.8 Option –AMD: Airbus AMD24C Test
For information regarding the operation of the AMD24C tests with the MXGui, please refer to the
Avionics Software Manual (CI part no. 4994-971 included on CDROM).
9.9 Option –787: Boeing B787-0147 Test
For information regarding the operation of the Boeing B787-0147 tests with the MXGui, please
refer to the Avionics Software Manual (CI part no. 4994-971 included on CDROM).
MX Series
241
9.10 Option –WHM: Watt Hour Measurement
9.10.1 General
This section describes the WHM option available for the MX Series Power Source.
9.10.2 Specification
All specifications are the same as the standard MX Power Source specifications in addition to
the following specifications:
Watt-hour
0-6.000KW
>6.000KW
0.2%FS +0.1%R
<100 Hz
0.5%FS +0.1%R
100-819 Hz
Times three of the above specification
9.10.3 Local Operation
•
From the Menu screen 2, select the APPLICATIONS SETUP 2 screen. The screen will appear
as shown in Figure 9-43. Use the up and down key to position the cursor to the WH METER
field. Press the Enter Key.
Figure 9-43: Application Screen
•
The WATT-HOUR METER screen shown in Figure 9-44 has the following fields:
Figure 9-44: Watt-Hour Meter Screen
1. START: This field will activate the watt-hour measurements. Moving the shuttle clockwise when the
field is highlighted will activate the watt-hour function and the field will change to STOP as shown in
Figure .
2. ETIME: This field will accumulate the time in hours, minutes and seconds.
3. WATT HR: This field will accumulate the watt-hour in KWH.
4. POWER: This field will report the instantaneous power in KW.
5. PK CURR: This field will report the peak current and will hold the maximum reading.
Figure 9-45: WH-Meter Screen with Function Active
MX Series
242
Note: Changing from stop to start will stop the measurement and will maintain the last data
record for the watt-hour meter. To restart the measurements, the field is toggled to the stop
position from the start position and the previous data will be reset to zeros.
WATT HR, POWER and PK CURR will display the data for the phase selected with the phase
key. If the phase is selected for all phases in a two or three phase system, the WATT HR and
POWER fields will show the sum of all phases. PK CURR will remain at the last selected phase.
Note: Changing Mode of operation from single phase to three phases while the Watt-hour
meter is in the active state will generate an error: “Input buffer full”. This error will halt the
measurements. To clear the error, the Watt-hour meter must be switched to the stopped state.
It is advised that the Watt-hour meter should be set to the stop state before changing the mode
of operation.
MX Series
243
9.11 Option –SNK: Current Sink
9.11.1 General
This section describes the SNK option available for the MX Series Power Source.
9.11.2 General Description
The –SNK or current sink option enables the MX power source to sink current from the unit
under test. This mode of operation is particularly useful when testing grid-tied products that feed
energy back onto the grid. The ability of the MX to simulate the grid provides unique
opportunities to test the EUT for immunity to commonly occurring line anomalies like voltage
and/or frequency fluctuations. Typical examples of these types of EUT’s are solar and/or wind
power inverters.
The SNK option requires special amplifiers that have a different control loop from the standard
MX amplifiers. This different control loop ensures greater stability under regenerative load
conditions. Due to this modified characteristic however, the upper frequency limit of an MX
configured with the –SNK option is reduced to 500Hz from the standard 819Hz.
MX units without the SNK will generate an error message if more than 20% of available power
(per phase) is regenerated by the load. It will shut off if the negative power reaches 30% of
available power.
Regenerative Mode of operation The MX will automatically operate in regenerative mode when
the Regenerative state is enabled and the measured power is negative, indicating energy is
being fed back into the MX amplifiers. In this mode of operation, the current limit mode will
behave differently than it does under normal load conditions.
When the absolute value of the current exceeds the regenerative programmable current limit set
point (current limit is set in the REGENERATE CONTROL screen), the output voltage of the MX
will be increased gradually in an attempt to reduce the amount of current being fed back. Note
that there is no other way for the MX to limit the current as the current is not generated by the
MX itself but rather by the load (inverter). Consequently, normal current limit operation does not
apply in this mode of operation. The voltage will continue to be raised until the user set over
voltage trip point is reached. This trip level can be set in the REGENERATE CONTROL screen
located under the APPLICATIONS SETUP 2 screen. At this point, and after the delay set by the
“DELAY F” parameter is reached, the AC frequency will be shifted by the amount set in the
dFREQ parameter field. Most inverters will shut down when detecting a sudden change in
frequency. If the frequency shift (dFREQ) is set to zero however, the output voltage will be
dropped to the under voltage limit setting (UNDER VOLT) set in the REGENERATE CONTROL
screen instead of the frequency shift. At this point, the EUT should shut down due to an under
voltage condition. Finally, the output replay is opened after the user set delay expires and the
current still exceed the current limit set in the REGENERATE CONTROL screen.
MX Series
244
9.11.3 REGENERATE Control Screen
Figure 9-46: REGENERATE CONTROL screen
The –SNK option mode of operation is controlled by parameters set in the REGENERATE
CONTROL SCREEN. Access to this screen is from the APPLICATIONS SETUP 2 screen by
selecting the SNK entry and pressing the ENTER key.
The following parameters are available to be programmed by the user.
Field
Description
Setting Range
Purpose
STATE
Enable the
Regenerate
Function
ON / OFF
This field allows the regenerative mode of operation to
be enabled. The regenerative state can only be
enabled if the output relay is open and the frequency
is set between 40Hz and 80Hz. If the state is OFF, the
MX operates like a normal MX without the SNK option
installed. In normal mode, only 20% of available
current can be sunk and the MX will generate an error
31 and 32. fault.
UNDER VOLT
EUT under
voltage limit
0.0 to max V
range value
Sets the EUT shut off voltage, Active only if the
dFREQ listed below is set to zero. This is the voltage
(AC or DC) at which the EUT will shut off. If set to a
value that will allow the EUT to continue operating, the
MX may be unable to limit the current being fed back
by the EUT.
OVER VOLT
EUT over voltage
limit
0.0 to max V
range value
Sets the EUT over voltage limit. This is the maximum
allowable voltage (AC or DC) at which the EUT can
operate. The output voltage may be increased up to
this level if the current limit is exceeded in an effort to
keep the current below the set current limit value.
This over-voltage threshold also triggers the power
source to either change the programming frequency or
reduce the output voltage depending on the delta
frequency setting (0.0Hz to reduce the output voltage
and any delta frequency to change the programming
frequency) after the DELAY F delay is reached.
dFREQ
Delta Frequency
0.0 to 6.0 Hz
This setting determines the size of the frequency shift
that will be applied to the EUT after the current limit
has been exceeded. If set to 0.0 Hz, no frequency shift
will be applied.
DELAY
Delay
0.25 to 5.00 sec
This delay setting field is used to set the delay time for
both the Frequency shift event (Delay F) and the
Output relay open event (Delay R).
Frequency Shift
application delay
time. (Delay F)
This delay determines how long the MX waits to apply
the programmed frequency shift to the EUT after the
set current limit level has been exceeded.
Output Relay
Open delay time.
This delay determines how long the MX waits to open
the output relay after the frequency shift has been
MX Series
245
Field
Description
CURR
Setting Range
Purpose
(Delay R)
applied and the current still exceeds the set current
limit level. If the frequency shift is set to 0.0Hz, this
setting determines the time the output relay will be
opened after the UNDER VOLTAGE is applied
Regen Current
Limit
PREVIOUS
SCREEN
This is the regenerate current limit set point that the
power source tries to limit the current to that is fed
back from the inverter. It is different from the normal
current limit set value shown in the PROGRAM
screen.
Returns to previous screen.
9.11.4 SNK Setting Retention
Parameters set in the REGENERATE CONTROL screen are retained in non-volatile memory
between uses except for the STATE field which always powers up in the OFF state. They are
NOT part of the setup registers however. Thus, only one set of parameters is retained reflecting
the last used settings.
9.11.5 SNK Remote Control
The same SNK parameters can also be programmed over any of the available remote control
interfaces using SCPI commands. Refer to the MX Programming Manual for details on
programming syntax.
9.11.6 SNK and Phase Modes
On MX models operating in three phase mode, the protection shut down mechanisms are
implemented on a phase by phase basis. This means that these parameters can be different for
each phase. To set all parameters to the same value for all three phases, use the PHASE button
on the front panel to select the ABC indication in the upper right corner of the LCD display. This
will allow you to set these values for all three phases. To set values by individual phase, use the
PHASE button to select either A, B, or C. The PHASE button cycles between A,B,C and ABC.
For three phase EUT’s, it is generally recommended to set the same values for all three phases.
9.11.7 Output Relay control while in Regen Mode
For some PV inverter tests, it may be necessary to ‘disconnect’ the inverter from the grid
(simulated by the power source). When the SNK state is ON, the OUTPUT relay control (Output
On/Off) will cause the output relay to open without the output voltage being dropped first. It is
important to make sure the inverter is in a balanced state with respect to its load so minimal
current flows into the power source. If not, the relay of the power source will be hot switched
which should be avoided.
MX Series
246
10. Error Messages
Any errors that occur during operation from either the front panel or the remote control interface
will result in error messages. Error messages are displayed in the upper left hand corner of the
LCD display. They are also stored in the error message queue from which they can be queried
using the SYST:ERR? Query. The error queue has a finite depth. If more error messages are
generated than can be held in the queue, a queue overflow message will be put in the last
queue location. To empty the queue, use the error query until the No Error result is received.
Errors appearing on the LCD will generally remain visible until the user moves to another
screen. If multiple error messages are generated in succession, only the last message will be
visible as there is only space for one error message on the LCD display.
The same area of the display is also used to display status messages. While error messages
always have a negative error number, status messages have a positive number.
The table below displays a list of possible error and status messages along with their possible
cause and remedy.
Number
Message String
Cause
"No error"
No errors in queue
-100
"Command error"
Unable to complete
requested operation
Unit may be in a mode
inconsistent with request.
-102
"Syntax error"
Command syntax incorrect.
Misspelled or unsupported
command
-103
"Invalid separator"
SCPI separator not
recognized
See SCPI section of
programming manual.
-104
"Data type error"
Data type invalid.
Check command for supported
data types
-108
"Parameter not
allowed"
One or more additional
parameters were received.
Check programming manual for
correct number of parameters
-109
"Missing parameter"
Too few parameters
received for requested
operation
correct number of parameters
-110
"Command header
error"
Command header incorrect
Check syntax of command.
-111
"header separator
error"
Invalid command separator
used.
Use semi-colon to separate
command headers
-112
"Program mnemonic
too long"
Syntax error
correct command syntax
-113
"Undefined header"
Command not recognized
error
-120
"Numeric data error"
Data received is not a
number
-121
"Invalid character in
number"
Number received contains
non-numeric character(s)
-123
"Exponent too large"
Exponent in number
exceeds limits
correct parameter range
-128
"Numeric data not
allowed"
Number received when
number is not allowed.
-168
"Block data not
allowed"
Block data was sent.
-200
"Execution error"
Command could not be
Command may be inconsistent
0
MX Series
Remedy
247
Number
MX Series
Message String
Cause
executed
Remedy
with mode of operation such as
programming frequency when in
DC mode.
-201
"Invalid while in local"
Command issued but unit
is not in remote state
Put instrument in remote state
before issuing GPIB commands.
-203
"Command protected"
Command is locked out
Some commands are supported
by the unit but are locked out for
protection of settings and are
not user accessible.
-210
"Trigger error"
Problem with trigger
system.
Unit could not generate trigger
for transient execution or
measurement.
-211
"Trigger ignored"
Trigger request has been
ignored.
Trigger setup incorrect or unit
was not armed when trigger was
received. Check transient
system or measurement trigger
system settings.
-213
"Init ignored"
Initialization request has
been ignored
Unit was told to go to armed
state but was unable to do so.
Could be caused by incorrect
transient system or
measurement acquisition setup.
-220
"Parameter error"
Parameter not allowed.
Incorrect parameter or
parameter value. Check
programming manual for
allowable parameters
-221
"Setting conflict"
Requested setting conflicts
with other setting in effect.
Check other settings. E.g. trying
to program a DC offset while in
AC mode
-222
"Data out of range"
Parameter data outside of
allowable range.
allowable parameter values
-223
"Too much data"
More data received than
expected
number of parameters or data
block size
-224
"Illegal parameter
value"
Parameter value is not
supported
correct parameters
-226
"Lists not same length"
One or more transient lists
programmed has different
length.
All lists must be of same length
or transient cannot be compiled
and executed.
-241
"Hardware missing"
N/A
N/A
-254
"Media full"
No storage space left to
save settings or data.
Delete other settings or data to
make room.
-255
“Directory full”
Too many waveform
directory entries
Delete one or more waveforms
from waveform memory to make
room.
-256
“File name not found”
Waveform requested not in
directory
Check waveform directory for
waveform names present.
-257
“File name error”
Incorrect filename
Too many or non ASCII
characters used in waveform file
definition.
-283
“Illegal variable name”
Variable name illegal.
Use ASCII characters only
-300
"Device specific error"
Hardware related error
Check hardware for proper
248
Number
-311
Message String
Cause
Remedy
operation.
"Memory error"
Waveform memory
checksum error.
May be the result of incomplete
user-defined waveform
download. Check interface and
try downloading waveform
again. Successful download
may clear this error condition.
Alternatively, use
TRAC:DEL:ALL command to
clear waveform memory.
MX Series
-314
"Save/recall memory
lost"
User setup register
contents lost
Store setup in same register
again.
-315
"Configuration memory
lost"
Hardware configuration
settings lost.
Contact CI service department
at [email protected] to
obtain instructions on restoring
configuration data.
-330
"Self-test failed"
Internal error
at [email protected]
-350
"Queue overflow"
Message queue full.
Too many messages. Read
status using SYST:ERR query
until 0, "No Error" is received
indicating queue empty.
-400
"Query error"
Unable to complete query.
correct query format and
parameters
-410
"Query
INTERRUPTED"
Query issued but response
not read.
Check application program for
correct flow. Response must be
read after each query to avoid
this error.
-420
"Query
UNTERMINATED"
Query incomplete.
Check for terminator after query
command.
-430
"Query
DEADLOCKED"
Query cannot be
completed
Check application program for
multiple queries
-440
"Query
UNTERMINATED"
Query incomplete.
Check for terminator after query
command.
1
"Output volt fault"
Output voltage does not
match programmed value.
Load exceeds current limit and
unit is in Constant Voltage (CV)
mode of operation. Reduce load
or increase CL setting.
Output voltage is driven above
programmed voltage by external
influence (Load, voltage
kickback, etc.)
2
"Current limit fault"
Current limit exceeded.
Load exceeds current limit and
unit is in Constant Voltage (CV)
mode of operation. Reduce load
or increase CL setting
3
"Temperature fault"
Temperature of heat sink
too high.
Reduce load. Ensure proper
airflow and exhaust clearance.
Check fan(s) for operation.
4
"External sync. error"
Could not sync to external
sync signal.
External sync signal missing,
disconnected or out of range.
5
"Initial memory lost"
Power on settings could
Save power on settings again to
249
Number
MX Series
Message String
Cause
not be recalled.
Remedy
overwrite old content.
6
"Limit memory lost"
Hardware configuration
settings lost.
configuration data.
7
"System memory lost"
Memory corrupted.
Recycle power.
8
"Calibration memory
lost"
Calibration data lost.
calibration data or recalibrate
unit.
9
"Start angle must be
first sequence"
Start phase angle in wrong
place..
Start phase angles can only
programmed at the start of a
transient list. Once a transient is
in progress, phase angle cannot
be changed.
10
"Illegal for DC"
Operation not possible in
DC mode.
Switch to AC or AC+DC mode.
11
"Duplicate sequence"
Transient list sequence
number already used.
User new or available sequence
number instead.
12
"Too many sequence"
Number of transient list
steps exceeds maximum.
Reduce the number of steps in
the transient list. (Max = 32 for
Series I or 100 for Series II).
13
"Missing list
parameter"
One or more transient list
parameters missing.
Check programmed lists.
14
"Voltage peak error "
Peak voltage exceeds
internal bus voltage
This error may occur when
selecting user defined wave
shapes with higher crest factors.
Reduce programmed RMS
value.
15
"Slew time exceed
dwell"
Time needed to slew to
final value is less than
dwell time.
Check dwell times in transient
list settings. Increase dwell time
or change slew rate for affected
parameter.
16
"Illegal during
transient"
Operation requested not
available while transient is
running.
Wait till transient execution is
completed or abort transient
execution first.
17
"Output relay must be
closed"
Operation not possible with
open relay
Close relay before attempting
operation. E.g. transient
execution requires output relay
to be closed.
18
"Trans. duration less
then 1msec"
Dwell time below minimum
or 1 msec
Increase dwell time to at least 1
msec.
19
"Clock and sync must
be internal"
Operation not possible with
external clock
Switch to internal sync. (Default)
20
"Input buffer full"
Too much data received.
Break up data in smaller blocks.
21
"EOS Fault"
Hardware error reported by
EOS option.
This option is not available
on MX Series products.
Cycle power on EOS to reset
error. If error persists, contact
CI service at
[email protected] for
repair.
22
"Waveform harmonics
Harmonic contents of user
Reduce harmonic content or
250
Number
Message String
limit"
Cause
defined wave shape are
too high and could damage
amplifier.
Remedy
reduce fundamental frequency
programmed.
23
"ALC or Impedance
must be off"
Conflict between ALC and
programmable impedance
mode.
Turn off ALC to use
programmable impedance. Turn
off programmable impedance to
use ALC.
24
"Output relay must be
open”
Attempting to change
voltage range while output
relay is closed.
Open output relay first, then
change range. This ensures the
load is physically disconnected
during voltage range change.
25
“Over voltage prot trip
Over voltage protection
trip.
Output voltage exceeds voltage
range value. Check sense
connections if external sense
mode is used.
26
“Peak curr prot trip”
Maximum available peak
current capability of power
source exceeded.
Note: Firmware rev 4.52 or
higher.
This error will trip if
PONS:CURR:PEAK:PROT
status is set to 1 and the peak
current drawn by the load
exceeds the maximum specified
peak current capability for more
than 30 seconds. To avoid this
error, reduce the load on the
power source or upgrade to a
larger power configuration.
27
“Frequency error”
Frequency is out of
allowable range.
Indicates a problem with
programmable controller.
28
“Phase error”
Incorrect phase
29
“DC component
exceeds limit”
The waveform selected
contains a DC offset that
exceeds the AC mode
capability.
Select AC+DC mode.
30
“Amplifier fault”
Amplifier fault.
Contact customer service.
31
“Warning negative
power near limit”
Approaching limit on the
amount of power that can
be fed back into the supply
by an active load. This is a
warning only.
Stop increasing power feedback
into the power supply. Typically
occurs when using AC inverters.
If power increases further, an
error 32 will be generated.
32
“Negative power fault”
Too much power fed back.
Power source output
disconnected.
Reduce the amount of power
being fed back into the power
source.
Table 10-1: Error Messages
MX Series
251
Index
creating.................................................... 126
deleting.................................................... 126
downloading ............................................ 126
+ +/- key............................................................ 82
1 D 160...............................................................195
DC offset ....................................................... 90
-HV range................................................ 194
Dimensions ................................................... 23
DIP switch ..................................................... 67
Distorted output .......................................... 182
DO-160 ....................................................... 195
DVM ............................................................ 154
7 704.......................................................228, 229
A ABD0100.1.8 ...............................................118
AC
input ........................................................... 40
Acoustic...................................................24, 34
active group.................................................126
ALC mode ...........................................113, 120
Arbitrary waveforms
Frequency response restrictions .............128
arrow keys ..................................................... 80
assembly part numbers................................. 12
B blinking
parameter entry ......................................... 80
BNC
ES connector ............................................. 66
C calibration
password .................................................161
calibration factors ................................121, 122
CE” mark ....................................................... 24
circuit breaker................................................ 78
clip level.......................................................104
Clock and Lock
Initialization ................................................ 71
-LKS configuration ...................................117
Clock and Lock mode.................................... 70
Clock and Lock Mode
Configuration ............................................. 70
clock mode .................................................... 90
constant current...........................................154
Constant Power............................................. 34
Construction
internal ....................................................... 23
controller assembly .....................................150
Controllers
programable............................................... 25
Cooling .......................................................... 23
current / voltage sensor...............................154
current limit..................................................149
custom waveforms ......................................126
MX Series
E Efficiency....................................................... 13
Emissions...................................................... 24
error messages........................................... 246
-ES ................................................................ 26
ES option
BNC........................................................... 66
Ethernet ...................................................... 112
External Sync
Clock/Lock................................................. 71
F FFT
analysis ................................................... 132
data displays ........................................... 133
filter ............................................................... 76
Finish
paint........................................................... 23
firmware
downloads ............................................... 187
Frequency Range ............................. 16, 30, 33
front panel ..................................................... 78
Front panel
Lock........................................................... 79
Function Strobe ............................................ 22
Functional Test ............................................. 72
fuse box .................................................. 27, 77
Fuse check ................................................. 183
Fuses
Input ........................................................ 148
G GPIB ........................................................... 112
H -HF ................................................................ 26
Hold-Up Time................................................ 13
-HV
restrictions............................................... 194
252
I IEC 1000-4-11 .............................................117
IEC 61000-4-11
Edition 1.0................................................209
Edition 2.0................................................209
IEEE-488 ...............................................22, 112
Immunity ........................................................ 24
Inrush Current ............................................... 13
installation ..................................................... 40
Introduction.................................................... 11
Isolation Voltage............................................ 13
J junction box .............................................27, 75
K keypad........................................................... 81
function ...................................................... 81
Keys
ES Option .................................................. 26
knob............................................................... 80
L LAN........................................................22, 112
Configuration ...........................................110
connector ................................................... 65
MAC Address............................................. 65
Settings....................................................110
-LAN option ................................................... 26
LCD display ................................................... 84
LED......................................................154, 181
LED indicators .............................................181
-LF ................................................................. 26
Line Current:.................................................. 13
Line Frequency.............................................. 13
Line VA: ......................................................... 13
list transient .................................................143
-LKM .............................................................. 26
-LKS............................................................... 26
Low Voltage PS...........................................154
M MAC Address ................................................ 65
maintenance................................................181
Material
chassis....................................................... 23
-MB ................................................................ 26
MB option ...................................................... 67
-MB option ..................................................... 67
-MB Option .................................................... 26
MEAS key...................................................... 81
measurement calibration.............................121
MENU key ..................................................... 81
MIL/STD-704 ...............................................117
Modulator ....................................................149
MX Series
MS704......................................................... 118
Multi-cabinet ................................................. 67
N Noise............................................................. 15
O Offset Voltage
DC ............................................................. 14
Option
-MB............................................................ 67
oscillator...................................................... 149
output
filter............................................................ 76
frequency .................................................. 89
Fuse box.................................................... 77
junction ...................................................... 75
noise spectrum.......................................... 35
voltage....................................................... 89
output calibration ........................................ 122
Output Coupling...................................... 15, 27
output filter .................................................... 27
output mode .................................................. 90
OUTPUT ON/OFF key.................................. 82
Output Status ................................................ 22
over current................................................. 154
Overcurrent................................................... 23
overload ........................................................ 79
Overtemperature........................................... 23
Overvoltage................................................... 23
P Parallel .......................................................... 25
password
calibration................................................ 161
phase angle .................................................. 90
PHASE key ................................................... 82
Power Factor ................................................ 13
power-down .................................................. 69
PROG key..................................................... 81
programmable output impedance............... 120
Programming manual ................................... 11
pulse transient ............................................ 142
R registers ...................................................... 103
Relay
output ........................................................ 25
Remote control ............................................. 79
Remote Inhibit............................................... 74
repeat.......................................................... 103
replacement parts ...................................... 190
RJ45
connector .................................................. 65
RS232 ......................................................... 112
Cable ......................................................... 62
253
Connector .................................................. 62
RS232 connector........................................... 62
RS232C......................................................... 22
RTCA DO160 ..............................................117
RTCA/DO-160 .............................................195
S Safety ............................................................ 24
sense...........................................................181
wiring ......................................................... 45
Series I .......................................................... 12
Series II ......................................................... 12
SET key ......................................................... 82
SET mode ..................................................... 80
Shock ............................................................ 24
Short Circuit
current........................................................ 23
shutdown ....................................................... 69
shuttle ............................................................ 80
SET mode.................................................. 80
Shuttle
IMMEDIATE mode..................................... 80
slew rates ....................................................145
-SNK .............................................................. 26
SNK option ..................................................243
status ............................................................. 79
step transient...............................................141
system interconnect ....................................148
System Interface .........................................154
T temperature
over ............................................................ 79
Temperature
operating,storage....................................... 24
Three phase ................................................148
top cover
removal ....................................................183
transient
execution .................................................147
transient execution ......................................103
transients
list.............................................................143
MX Series
pulse........................................................ 142
slew rate .................................................. 145
step.......................................................... 141
switching waveforms ............................... 146
Transients
Input .......................................................... 23
Trigger
input BNC .................................................. 21
output BNC................................................ 21
troubleshooting ........................................... 181
Turn on.......................................................... 69
U UP key .......................................................... 83
USB....................................................... 22, 112
connector .................................................. 64
V Vibration........................................................ 24
viewing angle ........................................ 25, 111
volt mode ...................................................... 90
voltage drop
cables .................................................. 43, 46
voltage rating ................................................ 39
W WAVE key..................................................... 81
waveform
data displays ........................................... 135
Waveform
acquisition ............................................... 134
waveform group .......................................... 115
Weight........................................................... 23
WHM ........................................................... 117
Wire Sizes............................................... 43, 46
wiring
input........................................................... 40
X -XV range
restrictions............................................... 194
254

MX Series AC and DC Power Source User Manual

Transcription

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